From cc87dbfcf9d69ff57858026ce7a4d62c85fb7c62 Mon Sep 17 00:00:00 2001 From: David Payr <1696106+Vanilagy@users.noreply.github.com> Date: Sun, 29 Dec 2024 02:21:54 +0100 Subject: [PATCH] Add some more argument validation --- dev/player.html | 4 +- dist/metamuxer.d.ts | 15 +++--- dist/metamuxer.js | 104 +++++++++++++++++++++++++++++++++++++++-- dist/metamuxer.min.js | 10 ++-- dist/metamuxer.min.mjs | 10 ++-- dist/metamuxer.mjs | 104 +++++++++++++++++++++++++++++++++++++++-- src/index.ts | 2 +- src/input-track.ts | 4 +- src/input.ts | 10 ++++ src/media-drain.ts | 90 ++++++++++++++++++++++++++++++++++- src/misc.ts | 6 +++ src/source.ts | 20 +++++--- 12 files changed, 340 insertions(+), 39 deletions(-) diff --git a/dev/player.html b/dev/player.html index 5204a4a..18f7d06 100644 --- a/dev/player.html +++ b/dev/player.html @@ -48,8 +48,8 @@ let videoRotation = 0; if (!videoTrack) { canvas.style.display = 'none'; } else { - canvas.width = await videoTrack.getRotatedWidth(); - canvas.height = await videoTrack.getRotatedHeight(); + canvas.width = await videoTrack.getDisplayWidth(); + canvas.height = await videoTrack.getDisplayHeight(); } const totalDuration = await input.computeDuration(); diff --git a/dist/metamuxer.d.ts b/dist/metamuxer.d.ts index 3120704..c0572f7 100644 --- a/dist/metamuxer.d.ts +++ b/dist/metamuxer.d.ts @@ -4,11 +4,6 @@ export declare const ALL_FORMATS: InputFormat[]; /** @public */ export declare type AnyIterable = Iterable | AsyncIterable; -/** @public */ -export declare class ArrayBufferSource extends Source { - constructor(buffer: ArrayBuffer); -} - /** @public */ export declare class ArrayBufferTarget extends Target { buffer: ArrayBuffer | null; @@ -83,6 +78,12 @@ export declare class BlobSource extends Source { constructor(blob: Blob); } +/** @public */ +declare class BufferSource_2 extends Source { + constructor(buffer: ArrayBuffer | Uint8Array); +} +export { BufferSource_2 as BufferSource } + /** @public */ export declare class CanvasDrain { constructor(videoTrack: InputVideoTrack, dimensions?: { @@ -152,7 +153,7 @@ export declare class Input { /** @public */ export declare class InputAudioTrack extends InputTrack { - getCodec(): Promise<"aac" | "opus">; + getCodec(): Promise; getNumberOfChannels(): Promise; getSampleRate(): Promise; getDecoderConfig(): Promise; @@ -180,7 +181,7 @@ export declare abstract class InputTrack { /** @public */ export declare class InputVideoTrack extends InputTrack { - getCodec(): Promise<"avc" | "hevc" | "vp8" | "vp9" | "av1">; + getCodec(): Promise; getCodedWidth(): Promise; getCodedHeight(): Promise; getRotation(): Promise; diff --git a/dist/metamuxer.js b/dist/metamuxer.js index de18ef1..a0e9d1f 100644 --- a/dist/metamuxer.js +++ b/dist/metamuxer.js @@ -23,7 +23,6 @@ var Metamuxer = (() => { __export(src_exports, { ALL_FORMATS: () => ALL_FORMATS, AUDIO_CODECS: () => AUDIO_CODECS, - ArrayBufferSource: () => ArrayBufferSource, ArrayBufferTarget: () => ArrayBufferTarget, AudioBufferDrain: () => AudioBufferDrain, AudioBufferSource: () => AudioBufferSource, @@ -33,6 +32,7 @@ var Metamuxer = (() => { BaseChunkDrain: () => BaseChunkDrain, BaseMediaFrameDrain: () => BaseMediaFrameDrain, BlobSource: () => BlobSource, + BufferSource: () => BufferSource, CanvasDrain: () => CanvasDrain, CanvasSource: () => CanvasSource, EncodedAudioChunkDrain: () => EncodedAudioChunkDrain, @@ -259,6 +259,11 @@ var Metamuxer = (() => { yield* source[Symbol.asyncIterator](); } }; + var validateAnyIterable = (iterable) => { + if (!(Symbol.iterator in iterable) && !(Symbol.asyncIterator in iterable)) { + throw new TypeError("Argument must be an iterable or async iterable."); + } + }; // src/subtitles.ts var cueBlockHeaderRegex = /(?:(.+?)\n)?((?:\d{2}:)?\d{2}:\d{2}.\d{3})\s+-->\s+((?:\d{2}:)?\d{2}:\d{2}.\d{3})/g; @@ -4079,22 +4084,28 @@ ${cue.notes ?? ""}`; return this._sizePromise ??= this._retrieveSize(); } }; - var ArrayBufferSource = class extends Source { + var BufferSource = class extends Source { constructor(buffer) { + if (!(buffer instanceof ArrayBuffer) && !(buffer instanceof Uint8Array)) { + throw new TypeError("buffer must be an ArrayBuffer or Uint8Array."); + } super(); - this._buffer = buffer; + this._bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer); } /** @internal */ async _read(start, end) { - return new Uint8Array(this._buffer, start, end - start); + return this._bytes.subarray(start, end); } /** @internal */ async _retrieveSize() { - return this._buffer.byteLength; + return this._bytes.byteLength; } }; var BlobSource = class extends Source { constructor(blob) { + if (!(blob instanceof Blob)) { + throw new TypeError("blob must be a Blob."); + } super(); this._blob = blob; } @@ -5907,6 +5918,15 @@ ${cue.notes ?? ""}`; this._demuxerPromise = null; /** @internal */ this._format = null; + if (!options || typeof options !== "object") { + throw new TypeError("options must be an object."); + } + if (!Array.isArray(options.formats) || options.formats.some((x) => !(x instanceof InputFormat))) { + throw new TypeError("options.formats must be an array of InputFormat."); + } + if (!(options.source instanceof Source)) { + throw new TypeError("options.source must be a Source."); + } this._formats = options.formats; this._source = options.source; this._mainReader = new Reader(options.source); @@ -5961,6 +5981,19 @@ ${cue.notes ?? ""}`; }; // src/media-drain.ts + var validateChunkRetrievalOptions = (options) => { + if (!options || typeof options !== "object") { + throw new TypeError("options must be an object."); + } + if (options.metadataOnly !== void 0 && typeof options.metadataOnly !== "boolean") { + throw new TypeError("options.metadataOnly, when defined, must be a boolean."); + } + }; + var validateTimestamp = (timestamp) => { + if (typeof timestamp !== "number" || Number.isNaN(timestamp)) { + throw new TypeError("timestamp must be a number."); + } + }; var BaseChunkDrain = class { async *chunks(startChunk, endTimestamp = Infinity) { const chunkQueue = []; @@ -6016,6 +6049,7 @@ ${cue.notes ?? ""}`; return structuredClone(frame); } async *mediaFramesAtTimestamps(timestamps) { + validateAnyIterable(timestamps); const timestampIterator = toAsyncIterator(timestamps); const timestampsOfInterest = []; const frameQueue = []; @@ -6054,6 +6088,7 @@ ${cue.notes ?? ""}`; let lastKeyChunk = null; let lastChunk = null; for await (const timestamp of timestampIterator) { + validateTimestamp(timestamp); while (frameQueue.length + decoder.decodeQueueSize > MAX_QUEUE_SIZE) { ({ promise: queueDequeue, resolve: onQueueDequeue } = promiseWithResolvers()); await queueDequeue; @@ -6123,6 +6158,8 @@ ${cue.notes ?? ""}`; } } async *mediaFramesInRange(startTimestamp = 0, endTimestamp = Infinity) { + validateTimestamp(startTimestamp); + validateTimestamp(endTimestamp); const frameQueue = []; let firstFrameQueued = false; let lastFrame = null; @@ -6220,27 +6257,46 @@ ${cue.notes ?? ""}`; }; var EncodedVideoChunkDrain = class extends BaseChunkDrain { constructor(videoTrack) { + if (!(videoTrack instanceof InputVideoTrack)) { + throw new TypeError("videoTrack must be an InputVideoTrack."); + } super(); this._videoTrack = videoTrack; } getFirstChunk(options = {}) { + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getFirstChunk(options); } getChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getChunk(timestamp, options); } getNextChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedVideoChunk)) { + throw new TypeError("chunk must be an EncodedVideoChunk."); + } + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getNextChunk(chunk, options); } getKeyChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getKeyChunk(timestamp, options); } getNextKeyChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedVideoChunk)) { + throw new TypeError("chunk must be an EncodedVideoChunk."); + } + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getNextKeyChunk(chunk, options); } }; var VideoFrameDrain = class extends BaseMediaFrameDrain { constructor(videoTrack) { + if (!(videoTrack instanceof InputVideoTrack)) { + throw new TypeError("videoTrack must be an InputVideoTrack."); + } super(); /** @internal */ this._decoderConfig = null; @@ -6261,6 +6317,7 @@ ${cue.notes ?? ""}`; return new EncodedVideoChunkDrain(this._videoTrack); } async getFrame(timestamp) { + validateTimestamp(timestamp); for await (const frame of this.mediaFramesAtTimestamps([timestamp])) { return frame; } @@ -6275,6 +6332,18 @@ ${cue.notes ?? ""}`; }; var CanvasDrain = class { constructor(videoTrack, dimensions) { + if (!(videoTrack instanceof InputVideoTrack)) { + throw new TypeError("videoTrack must be an InputVideoTrack."); + } + if (dimensions && typeof dimensions !== "object") { + throw new TypeError("dimensions, when defined, must be an object."); + } + if (dimensions && (!Number.isInteger(dimensions.width) || dimensions.width <= 0)) { + throw new TypeError("dimensions.width must be a positive integer."); + } + if (dimensions && (!Number.isInteger(dimensions.height) || dimensions.height <= 0)) { + throw new TypeError("dimensions.height must be a positive integer."); + } this._videoTrack = videoTrack; this._dimensions = dimensions; this._videoFrameDrain = new VideoFrameDrain(videoTrack); @@ -6303,6 +6372,7 @@ ${cue.notes ?? ""}`; return result; } async getCanvas(timestamp) { + validateTimestamp(timestamp); const frame = await this._videoFrameDrain.getFrame(timestamp); return frame && this._videoFrameToWrappedCanvas(frame); } @@ -6319,27 +6389,46 @@ ${cue.notes ?? ""}`; }; var EncodedAudioChunkDrain = class extends BaseChunkDrain { constructor(audioTrack) { + if (!(audioTrack instanceof InputAudioTrack)) { + throw new TypeError("audioTrack must be an InputAudioTrack."); + } super(); this._audioTrack = audioTrack; } getFirstChunk(options = {}) { + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getFirstChunk(options); } getChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getChunk(timestamp, options); } getNextChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedAudioChunk)) { + throw new TypeError("chunk must be an EncodedAudioChunk."); + } + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getNextChunk(chunk, options); } getKeyChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getKeyChunk(timestamp, options); } getNextKeyChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedAudioChunk)) { + throw new TypeError("chunk must be an EncodedAudioChunk."); + } + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getNextKeyChunk(chunk, options); } }; var AudioDataDrain = class extends BaseMediaFrameDrain { constructor(audioTrack) { + if (!(audioTrack instanceof InputAudioTrack)) { + throw new TypeError("audioTrack must be an InputAudioTrack."); + } super(); /** @internal */ this._decoderConfig = null; @@ -6360,6 +6449,7 @@ ${cue.notes ?? ""}`; return new EncodedAudioChunkDrain(this._audioTrack); } async getData(timestamp) { + validateTimestamp(timestamp); for await (const data of this.mediaFramesAtTimestamps([timestamp])) { return data; } @@ -6374,6 +6464,9 @@ ${cue.notes ?? ""}`; }; var AudioBufferDrain = class { constructor(audioTrack) { + if (!(audioTrack instanceof InputAudioTrack)) { + throw new TypeError("audioTrack must be an InputAudioTrack."); + } this._audioDataDrain = new AudioDataDrain(audioTrack); } /** @internal */ @@ -6398,6 +6491,7 @@ ${cue.notes ?? ""}`; return result; } async getBuffer(timestamp) { + validateTimestamp(timestamp); const data = await this._audioDataDrain.getData(timestamp); return data && this._audioDataToWrappedArrayBuffer(data); } diff --git a/dist/metamuxer.min.js b/dist/metamuxer.min.js index 3376f62..c3df571 100644 --- a/dist/metamuxer.min.js +++ b/dist/metamuxer.min.js @@ -1,10 +1,10 @@ -"use strict";var Metamuxer=(()=>{var gt=Object.defineProperty;var Cr=Object.getOwnPropertyDescriptor;var Sr=Object.getOwnPropertyNames;var wr=Object.prototype.hasOwnProperty;var yr=(i,t)=>{for(var e in t)gt(i,e,{get:t[e],enumerable:!0})},vr=(i,t,e,r)=>{if(t&&typeof t=="object"||typeof t=="function")for(let s of Sr(t))!wr.call(i,s)&&s!==e&>(i,s,{get:()=>t[s],enumerable:!(r=Cr(t,s))||r.enumerable});return i};var _r=i=>vr(gt({},"__esModule",{value:!0}),i);var 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0);let a={track:e,type:"video",info:{width:r.decoderConfig.codedWidth,height:r.decoderConfig.codedHeight,decoderConfig:r.decoderConfig},timescale:e.metadata.frameRate??57600,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return this.trackDatas.push(a),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),a}getAudioTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;je(r),d(r),d(r.decoderConfig);let a={track:e,type:"audio",info:{numberOfChannels:r.decoderConfig.numberOfChannels,sampleRate:r.decoderConfig.sampleRate,decoderConfig:r.decoderConfig},timescale:r.decoderConfig.sampleRate,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return this.trackDatas.push(a),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),a}getSubtitleTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;qe(r),d(r),d(r.config);let a={track:e,type:"subtitle",info:{config:r.config},timescale:1e3,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[],lastCueEndTimestamp:0,cueQueue:[],nextSourceId:0,cueToSourceId:new WeakMap};return this.trackDatas.push(a),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),this.validateAndNormalizeTimestamp(e,0,!0),a}async addEncodedVideoChunk(e,r,s){let a=await this.mutex.acquire();try{let n=this.getVideoTrackData(e,s),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=this.validateAndNormalizeTimestamp(n.track,r.timestamp,r.type==="key"),u=this.createSampleForTrack(n,o,c,(r.duration??0)/1e6,r.type);await this.registerSample(n,u)}finally{a()}}async addEncodedAudioChunk(e,r,s){let a=await this.mutex.acquire();try{let n=this.getAudioTrackData(e,s),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type,u=this.validateAndNormalizeTimestamp(n.track,r.timestamp,c==="key"),m=this.createSampleForTrack(n,o,u,(r.duration??0)/1e6,c);await this.registerSample(n,m)}finally{a()}}async addSubtitleCue(e,r,s){let a=await this.mutex.acquire();try{let n=this.getSubtitleTrackData(e,s);this.validateAndNormalizeTimestamp(n.track,1e6*r.timestamp,!0),e.source._codec==="webvtt"&&(n.cueQueue.push(r),await this.processWebVTTCues(n,r.timestamp))}finally{a()}}async processWebVTTCues(e,r){for(;e.cueQueue.length>0;){let s=new Set([]);for(let m of e.cueQueue)d(m.timestamp<=r),d(e.lastCueEndTimestamp<=m.timestamp+m.duration),s.add(Math.max(m.timestamp,e.lastCueEndTimestamp)),s.add(m.timestamp+m.duration);let a=[...s].sort((m,l)=>m-l),n=a[0],o=a[1]??n;if(r=o)break;oe.lastIndex=0;let f=oe.test(l.text),g=l.timestamp+l.duration,b=e.cueToSourceId.get(l);if(b===void 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r=[e.info.decoderConfig.description?{id:25506,data:q(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],s=e.info.decoderConfig.colorSpace,a={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},ze(s)?{id:21936,data:[{id:21937,data:Y[s.matrix]},{id:21946,data:G[s.transfer]},{id:21947,data:X[s.primaries]},{id:21945,data:s.fullRange?2:1}]}:null]};return r.push(a),r}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:q(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new we(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:D.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:lr,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return d(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;$e(r),d(r),d(r.decoderConfig),d(r.decoderConfig.codedWidth!==void 0),d(r.decoderConfig.codedHeight!==void 0);let a={track:e,type:"video",info:{width:r.decoderConfig.codedWidth,height:r.decoderConfig.codedHeight,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(a),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),a}getAudioTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;je(r),d(r),d(r.decoderConfig);let a={track:e,type:"audio",info:{numberOfChannels:r.decoderConfig.numberOfChannels,sampleRate:r.decoderConfig.sampleRate,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(a),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),a}getSubtitleTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;qe(r),d(r),d(r.config);let a={track:e,type:"subtitle",info:{config:r.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(a),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),a}async addEncodedVideoChunk(e,r,s){let a=await this.mutex.acquire();try{let n=this.getVideoTrackData(e,s),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type==="key",u=this.validateAndNormalizeTimestamp(n.track,r.timestamp,c),m=this.createInternalChunk(o,u,(r.duration??0)/1e6,r.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(n,m),n.chunkQueue.push(m),await this.interleaveChunks()}finally{a()}}async 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e.data=="number"){let r=e.size??Ot(e.data);this.writeEBMLVarInt(r),this.writeUnsignedInt(e.data,r)}else if(typeof e.data=="string")this.writeEBMLVarInt(e.data.length),this.writeString(e.data);else if(e.data instanceof Uint8Array)this.writeEBMLVarInt(e.data.byteLength,e.size),this.writer.write(e.data);else if(e.data instanceof ve)this.writeEBMLVarInt(4),this.writeFloat32(e.data.value);else if(e.data instanceof pe)this.writeEBMLVarInt(8),this.writeFloat64(e.data.value);else if(e.data instanceof Ie){let r=e.size??Et(e.data.value);this.writeEBMLVarInt(r),this.writeSignedInt(e.data.value,r)}}}beforeTrackAdd(e){if(this.format instanceof oe)if(e.type==="video"){if(!["vp8","vp9","av1"].includes(e.source._codec))throw new Error("WebM only supports VP8, VP9 and AV1 as video codecs. 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r={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:hr},{id:22337,data:hr},this.format._options.streamable?null:e]};this.segmentInfo=r}createTracks(){let e={id:374648427,data:[]};this.tracksElement=e;for(let r of this.trackDatas)e.data.push({id:174,data:[{id:215,data:r.track.id},{id:29637,data:r.track.id},{id:131,data:Fi[r.type]},{id:134,data:Ei[r.track.source._codec]},r.type==="video"?this.videoSpecificTrackInfo(r):null,r.type==="audio"?this.audioSpecificTrackInfo(r):null,r.type==="subtitle"?this.subtitleSpecificTrackInfo(r):null]})}videoSpecificTrackInfo(e){let r=[e.info.decoderConfig.description?{id:25506,data:ee(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],a=e.info.decoderConfig.colorSpace,n={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},Be(a)?{id:21936,data:[{id:21937,data:ie[a.matrix]},{id:21946,data:re[a.transfer]},{id:21947,data:te[a.primaries]},{id:21945,data:a.fullRange?2:1}]}:null]};return r.push(n),r}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:ee(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new ve(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:D.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:pr,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return m(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,r){let a=this.trackDatas.find(s=>s.track===e);if(a)return a;qe(r),m(r),m(r.decoderConfig),m(r.decoderConfig.codedWidth!==void 0),m(r.decoderConfig.codedHeight!==void 0);let n={track:e,type:"video",info:{width:r.decoderConfig.codedWidth,height:r.decoderConfig.codedHeight,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(n),this.trackDatas.sort((s,o)=>s.track.id-o.track.id),n}getAudioTrackData(e,r){let a=this.trackDatas.find(s=>s.track===e);if(a)return a;Xe(r),m(r),m(r.decoderConfig);let n={track:e,type:"audio",info:{numberOfChannels:r.decoderConfig.numberOfChannels,sampleRate:r.decoderConfig.sampleRate,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(n),this.trackDatas.sort((s,o)=>s.track.id-o.track.id),n}getSubtitleTrackData(e,r){let a=this.trackDatas.find(s=>s.track===e);if(a)return a;Ge(r),m(r),m(r.config);let n={track:e,type:"subtitle",info:{config:r.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(n),this.trackDatas.sort((s,o)=>s.track.id-o.track.id),n}async addEncodedVideoChunk(e,r,a){let n=await this.mutex.acquire();try{let s=this.getVideoTrackData(e,a),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type==="key",u=this.validateAndNormalizeTimestamp(s.track,r.timestamp,c),d=this.createInternalChunk(o,u,(r.duration??0)/1e6,r.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(s,d),s.chunkQueue.push(d),await this.interleaveChunks()}finally{n()}}async addEncodedAudioChunk(e,r,a){let n=await this.mutex.acquire();try{let s=this.getAudioTrackData(e,a),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type,u=c==="key",d=this.validateAndNormalizeTimestamp(s.track,r.timestamp,u),l=this.createInternalChunk(o,d,(r.duration??0)/1e6,c);s.chunkQueue.push(l),await this.interleaveChunks()}finally{n()}}async addSubtitleCue(e,r,a){let n=await this.mutex.acquire();try{let s=this.getSubtitleTrackData(e,a),o=this.validateAndNormalizeTimestamp(s.track,1e6*r.timestamp,!0),c=r.text,u=Math.floor(o*1e3);me.lastIndex=0,c=c.replace(me,g=>{let h=We(g.slice(1,-1))-u;return`<${He(h)}>`});let d=D.encode(c),l=`${r.settings??""} ${r.identifier??""} -${r.notes??""}`,f=this.createInternalChunk(m,o,r.duration,"key",l.trim()?D.encode(l):null);n.chunkQueue.push(f),await this.interleaveChunks()}finally{a()}}async interleaveChunks(){for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(r=>r.track===e))return;e:for(;;){let e=null,r=1/0;for(let a of this.trackDatas){if(a.chunkQueue.length===0&&!a.track.source._closed)break e;a.chunkQueue.length>0&&a.chunkQueue[0].timestamp=2&&s++;let u={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];Vt(r.data,s+0,s+3,u)}createInternalChunk(e,r,s,a,n=null){return{data:e,type:a,timestamp:r,duration:s,additions:n}}writeBlock(e,r){this.segment||(this.createTracks(),this.createSegment());let s=Math.floor(1e3*r.timestamp),a=this.trackDatas.every(l=>{if(l.track.source._closed)return!0;if(e===l)return r.type==="key";let f=l.chunkQueue[0];return f&&f.type==="key"});(!this.currentCluster||a&&s-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(s);let n=s-this.currentClusterMsTimestamp;if(n<0)return;if(n>=Ot)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${Ot} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${Ot} milliseconds.`);let c=new Uint8Array(4),u=new DataView(c.buffer);u.setUint8(0,128|e.track.id),u.setInt16(1,n,!1);let m=Math.floor(1e3*r.duration);if(m===0&&!r.additions){u.setUint8(3,+(r.type==="key")<<7);let l={id:163,data:[c,r.data]};this.writeEBML(l)}else{let l={id:160,data:[{id:161,data:[c,r.data]},r.type==="delta"?{id:251,data:new ye(e.lastWrittenMsTimestamp-s)}:null,r.additions?{id:30113,data:[{id:166,data:[{id:165,data:r.additions},{id:238,data:1}]}]}:null,m>0?{id:155,data:m}:null]};this.writeEBML(l)}this.duration=Math.max(this.duration,s+m),e.lastWrittenMsTimestamp=s,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:fr,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){d(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),r=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,fr),this.writer.seek(r);let s=this.offsets.get(this.currentCluster)-this.segmentDataOffset;d(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(a=>({id:183,data:[{id:247,data:a.track.id},{id:241,data:s}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let r of this.trackDatas)for(;r.chunkQueue.length>0;)this.writeBlock(r,r.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),d(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let r=this.writer.getPos(),s=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(s,lr),this.segmentDuration.data=new de(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(r)}e()}};var $=class{},Ye=class extends ${constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(t.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=t}_createMuxer(t){return new Xe(t,this)}},ve=class extends ${constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.streamable!==void 0&&typeof t.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=t}_createMuxer(t){return new Ge(t,this)}},te=class extends ve{};var re=class{constructor(){this._connectedTrack=null;this._closed=!1;this._offsetTimestamps=!1}_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},W=class extends re{constructor(e){super();this._connectedTrack=null;if(!J.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${J.join(", ")}.`);this._codec=e}},Ze=class extends W{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,t,e)}},Oi=5,Ei=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!J.includes(i.codec))throw new TypeError(`Invalid video codec '${i.codec}'. Must be one of: ${J.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(i.latencyMode!==void 0&&!["quality","realtime"].includes(i.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},_e=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastMultipleOfKeyFrameInterval=-1;this.lastWidth=null;this.lastHeight=null;Ei(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(t.codedWidth!==this.lastWidth||t.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${t.codedWidth}x${t.codedHeight}.`)}else this.lastWidth=t.codedWidth,this.lastHeight=t.codedHeight;this.ensureEncoder(t),d(this.encoder);let e=Math.floor(t.timestamp/1e6/Oi);this.encoder.encode(t,{keyFrame:e!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=e,this.encoder.encodeQueueSize>=4&&await new Promise(r=>this.encoder.addEventListener("dequeue",r,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new VideoEncoder({output:(e,r)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,e,r),error:e=>console.error("Video encode error:",e)}),this.encoder.configure({codec:sr(this.codecConfig.codec,t.codedWidth,t.codedHeight,this.codecConfig.bitrate),width:t.codedWidth,height:t.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...cr(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},Je=class extends W{constructor(t){super(t.codec),this._encoder=new _e(this,t)}digest(t){if(!(t instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},et=class extends W{constructor(t,e){if(!(t instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(e.codec),this._encoder=new _e(this,e),this._canvas=t}digest(t,e=0){if(!Number.isFinite(t)||t<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(e)||e<0)throw new TypeError("duration must be a non-negative number.");let r=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*t),duration:Math.round(1e6*e),alpha:"discard"}),s=this._encoder.digest(r);return r.close(),s}_flush(){return this._encoder.flush()}},tt=class extends W{constructor(e,r){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");r={...r,latencyMode:"realtime"};super(r.codec);this._abortController=null;this._offsetTimestamps=!0;this._encoder=new _e(this,r),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),r=new WritableStream({write:s=>{this._encoder.digest(s),s.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},N=class extends re{constructor(e){super();this._connectedTrack=null;if(!ee.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${ee.join(", ")}.`);this._codec=e}},rt=class extends N{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,t,e)}},Fi=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!ee.includes(i.codec))throw new TypeError(`Invalid audio codec '${i.codec}'. Must be one of: ${ee.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},Ie=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastNumberOfChannels=null;this.lastSampleRate=null;Fi(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(t.numberOfChannels!==this.lastNumberOfChannels||t.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${t.numberOfChannels} channels at ${t.sampleRate} Hz.`)}else this.lastNumberOfChannels=t.numberOfChannels,this.lastSampleRate=t.sampleRate;this.ensureEncoder(t),d(this.encoder),this.encoder.encode(t),this.encoder.encodeQueueSize>=4&&await new Promise(e=>this.encoder.addEventListener("dequeue",e,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new AudioEncoder({output:(e,r)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,e,r),error:e=>console.error("Audio encode error:",e)}),this.encoder.configure({codec:nr(this.codecConfig.codec,t.numberOfChannels,t.sampleRate),numberOfChannels:t.numberOfChannels,sampleRate:t.sampleRate,bitrate:this.codecConfig.bitrate,...ur(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},it=class extends N{constructor(t){super(t.codec),this._encoder=new Ie(this,t)}digest(t){if(!(t instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},st=class extends N{constructor(e){super(e.codec);this._accumulatedFrameCount=0;this._encoder=new Ie(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let r=e.numberOfChannels,s=e.sampleRate,a=e.length,n=new Float32Array(r*a);for(let u=0;u{this._encoder.digest(s),s.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},ie=class extends re{constructor(e){super();this._connectedTrack=null;if(!Se.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${Se.join(", ")}.`);this._codec=e}},nt=class extends ie{constructor(t){super(t),this._parser=new Ue({codec:t,output:(e,r)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,e,r),error:e=>console.error("Subtitle parse error:",e)})}digest(t){if(typeof t!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(t),this._connectedTrack.output._muxer.mutex.currentPromise}};var ot=class{constructor(t){this._tracks=[];this._started=!1;this._finalizing=!1;this._mutex=new L;if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(!(t.format instanceof $))throw new TypeError("options.format must be an OutputFormat.");if(!(t.target instanceof K))throw new TypeError("options.target must be a Target.");if(t.target._output)throw new Error("Target is already used for another output.");t.target._output=this,this._writer=t.target._createWriter(),this._muxer=t.format._createMuxer(this)}addVideoTrack(t,e={}){if(!(t instanceof W))throw new TypeError("source must be a VideoSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");if(typeof e.rotation=="number"&&![0,90,180,270].includes(e.rotation))throw new TypeError(`Invalid video rotation: ${e.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(e.rotation)&&(e.rotation.length!==9||e.rotation.some(r=>!Number.isFinite(r))))throw new TypeError(`Invalid video transformation matrix: ${e.rotation.join()}`);if(e.frameRate!==void 0&&(!Number.isInteger(e.frameRate)||e.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${e.frameRate}. Must be a positive integer.`);this._addTrack("video",t,e)}addAudioTrack(t,e={}){if(!(t instanceof N))throw new TypeError("source must be an AudioSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",t,e)}addSubtitleTrack(t,e={}){if(!(t instanceof ie))throw new TypeError("source must be a SubtitleSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",t,e)}_addTrack(t,e,r){if(this._started)throw new Error("Cannot add track after output has started.");if(e._connectedTrack)throw new Error("Source is already used for a track.");let s={id:this._tracks.length+1,output:this,type:t,source:e,metadata:r};this._muxer.beforeTrackAdd(s),this._tracks.push(s),e._connectedTrack=s}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let t=await this._mutex.acquire();await this._muxer.start();for(let e of this._tracks)e.source._start();t()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let t=await this._mutex.acquire(),e=this._tracks.map(r=>r.source._flush());await Promise.all(e),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),t()}};var le=class{constructor(){this._sizePromise=null}_getSize(){return this._sizePromise??=this._retrieveSize()}},ct=class extends le{constructor(t){super(),this._buffer=t}async _read(t,e){return new Uint8Array(this._buffer,t,e-t)}async _retrieveSize(){return this._buffer.byteLength}},ut=class extends le{constructor(t){super(),this._blob=t}async _read(t,e){let s=await this._blob.slice(t,e).arrayBuffer();return new Uint8Array(s)}async _retrieveSize(){return this._blob.size}};var mt=class{constructor(t){this.input=t}};var fe=class{constructor(t){this._backing=t}isVideoTrack(){return this instanceof se}isAudioTrack(){return this instanceof ae}computeDuration(){return this._backing.computeDuration()}},se=class extends fe{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getCodedWidth(){return this._backing.getCodedWidth()}getCodedHeight(){return this._backing.getCodedHeight()}getRotation(){return this._backing.getRotation()}async getDisplayWidth(){return await this._backing.getRotation()%180===0?this._backing.getCodedWidth():this._backing.getCodedHeight()}async getDisplayHeight(){return await this._backing.getRotation()%180===0?this._backing.getCodedHeight():this._backing.getCodedWidth()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},ae=class extends fe{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var pe=class{constructor(t,e=1/0){this.source=t;this.maxStorableBytes=e;this.loadedSegments=[];this.loadingSegments=[];this.sourceSizePromise=null;this.nextAge=0;this.totalStoredBytes=0}async loadRange(t,e){e=Math.min(e,await this.source._getSize());let r=this.loadingSegments.find(c=>c.start<=t&&c.end>=e);if(r){await r.promise;return}if(this.loadedSegments.some(c=>c.start<=t&&c.end>=e))return;let a=this.source._read(t,e),n={start:t,end:e,promise:a};this.loadingSegments.push(n);let o=await a;Wt(this.loadingSegments,n),this.insertIntoLoadedSegments(t,o)}insertIntoLoadedSegments(t,e){let r={start:t,end:t+e.byteLength,bytes:e,view:new DataView(e.buffer),age:this.nextAge++},s=I(this.loadedSegments,t,a=>a.start);(s===-1||this.loadedSegments[s].start=r.end)break;r.start<=n.start&&n.end<=r.end&&(this.loadedSegments.splice(a,1),a--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let a=null,n=-1;for(let o=0;oa.start),s=null;if(r!==-1)for(let a=r;at)break;if(e<=n.end){s=n;break}}if(!s)throw new Error(`No segment loaded for range [${t}, ${e}).`);return s.age=this.nextAge++,{view:s.view,offset:s.bytes.byteOffset+t-s.start}}forgetRange(t,e){if(e<=t)return;let r=I(this.loadedSegments,t,a=>a.start);if(r===-1)return;let s=this.loadedSegments[r];s.start!==t||s.end!==e||(this.loadedSegments.splice(r,1),this.totalStoredBytes-=s.bytes.byteLength)}};var ne=class{constructor(t){this.reader=t;this.pos=0}readRange(t,e){let{view:r,offset:s}=this.reader.getViewAndOffset(t,e);return new Uint8Array(r.buffer,s,e-t)}readU8(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,t.getUint8(e)}readU16(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,t.getUint16(e,!1)}readU24(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let r=t.getUint16(e,!1),s=t.getUint8(e+2);return r*256+s}readS32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getUint32(e,!1)}readI32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU64(){let t=this.readU32(),e=this.readU32();return t*4294967296+e}readF64(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,t.getFloat64(e,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(t){let{view:e,offset:r}=this.reader.getViewAndOffset(this.pos,this.pos+t);this.pos+=t;let s="";for(let a=0;as.computeDuration()));return Math.max(0,...r)}async getTracks(){return await this.readMetadata(),this.tracks.map(e=>e.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let r=await Promise.all(this.tracks.map(a=>a.inputTrack.getCodecMimeType())),s=[...new Set(r)];e+=`; codecs="${s.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.pos=0&&ss.presentationTimestamp-a.presentationTimestamp),e.sampleTable}async readFragment(){let e=this.isobmffReader.pos;await this.isobmffReader.reader.loadRange(this.isobmffReader.pos,this.isobmffReader.pos+16);let r=this.isobmffReader.readBoxHeader();d(r.name==="moof"),await this.isobmffReader.reader.loadRange(e,e+r.totalSize),this.isobmffReader.pos=e,this.traverseBox();let s=H(this.fragments,e,n=>n.moofOffset);d(s!==-1);let a=this.fragments[s];d(a.moofOffset===e),this.isobmffReader.reader.forgetRange(e,e+r.totalSize);for(let[n,o]of a.trackData){if(o.startTimestampIsFinal)continue;let c=this.tracks.find(f=>f.id===n);this.isobmffReader.pos=0;let u=null,m=null,l=I(c.fragments,e-1,f=>f.moofOffset);for(l!==-1&&(u=c.fragments[l],m=u,this.isobmffReader.pos=u.moofOffset+u.moofSize);this.isobmffReader.posp.moofOffset);if(b===-1){this.isobmffReader.pos=f;let p=await this.readFragment();u&&(u.nextFragment=p),u=p}else{let p=this.fragments[b];u&&(u.nextFragment=p),u=p}}this.isobmffReader.pos=f+g.totalSize}u&&u.trackData.has(n)&&(m=u)}if(m){let f=m.trackData.get(n);d(f.startTimestampIsFinal),hr(o,f.endTimestamp)}o.startTimestampIsFinal=!0}return a}readContiguousBoxes(e){let r=this.isobmffReader.pos;for(;this.isobmffReader.pos-rl.every((f,g)=>f===u[g]));m===-1?a.rotation=0:a.rotation=90*m}break;case"mdhd":{let a=this.currentTrack;d(a);let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3,n===0?(this.isobmffReader.pos+=8,a.timescale=this.isobmffReader.readU32(),a.durationInTimescale=this.isobmffReader.readU32()):n===1&&(this.isobmffReader.pos+=16,a.timescale=this.isobmffReader.readU32(),a.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let a=this.currentTrack;d(a),this.isobmffReader.pos+=8;let n=this.isobmffReader.readAscii(4);n==="vide"?a.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:n==="soun"&&(a.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let a=this.currentTrack;d(a),a.sampleTableOffset=e,this.readContiguousBoxes(r.contentSize)}break;case"stsd":{let a=this.currentTrack;if(d(a),a.info===null||a.sampleTable)break;let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=this.isobmffReader.readU32();for(let c=0;c0){if(m===1)this.isobmffReader.pos+=4*4;else if(m===2){this.isobmffReader.pos+=4,f=this.isobmffReader.readF64(),l=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),b=this.isobmffReader.readU32(),p=this.isobmffReader.readU32(),k=this.isobmffReader.readU32()}}a.info.numberOfChannels=l,a.info.sampleRate=f,this.readContiguousBoxes(e+u.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let a=this.currentTrack;d(a&&a.info),a.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"hvcC":{let a=this.currentTrack;d(a&&a.info),a.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"colr":{let a=this.currentTrack;if(d(a&&a.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let o=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),u=this.isobmffReader.readU16(),m=!!(this.isobmffReader.readU8()&128);a.info.colorSpace={primaries:Dt[o],transfer:Pt[c],matrix:zt[u],fullRange:m}}break;case"wave":r.totalSize>8&&this.readContiguousBoxes(r.contentSize);break;case"esds":{let a=this.currentTrack;d(a&&a.info),this.isobmffReader.pos+=4;let n=this.isobmffReader.readU8();d(n===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let o=this.isobmffReader.readU8(),c=(o&128)!==0,u=(o&64)!==0,m=(o&32)!==0;if(c&&(this.isobmffReader.pos+=2),u){let p=this.isobmffReader.readU8();this.isobmffReader.pos+=p}m&&(this.isobmffReader.pos+=2);let l=this.isobmffReader.readU8();d(l===4),this.isobmffReader.readIsomVariableInteger();let f=this.isobmffReader.readU8();d(f===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();d(g===5);let b=this.isobmffReader.readIsomVariableInteger();a.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+b)}break;case"stts":{let a=this.currentTrack;if(d(a),!a.sampleTable)break;this.isobmffReader.pos+=4;let n=this.isobmffReader.readU32(),o=0,c=0;for(let u=0;uv.id===n);if(!o)break;o.fragmentLookupTable=[];let c=this.isobmffReader.readU32(),u=(c&48)>>4,m=(c&12)>>2,l=c&3,f=this.isobmffReader,g=[f.readU8.bind(f),f.readU16.bind(f),f.readU24.bind(f),f.readU32.bind(f)],b=g[u],p=g[m],k=g[l],w=this.isobmffReader.readU32();for(let v=0;vn.moofOffset);this.fragments.splice(a+1,0,this.currentFragment);for(let[,n]of this.currentFragment.trackData){let o=n.samples[0],c=R(n.samples);this.currentFragment.dataStart=Math.min(this.currentFragment.dataStart,o.byteOffset),this.currentFragment.dataEnd=Math.max(this.currentFragment.dataEnd,c.byteOffset+c.byteSize)}this.currentFragment=null}break;case"traf":if(d(this.currentFragment),this.readContiguousBoxes(r.contentSize),this.currentTrack){let a=this.currentFragment.trackData.get(this.currentTrack.id);if(a){let n=I(this.currentTrack.fragments,this.currentFragment.moofOffset,c=>c.moofOffset);this.currentTrack.fragments.splice(n+1,0,this.currentFragment);let{currentFragmentState:o}=this.currentTrack;d(o),o.startTimestamp!==null&&(hr(a,o.startTimestamp),a.startTimestampIsFinal=!0)}this.currentTrack.currentFragmentState=null,this.currentTrack=null}break;case"tfhd":{d(this.currentFragment),this.isobmffReader.pos+=1;let a=this.isobmffReader.readU24(),n=!!(a&1),o=!!(a&2),c=!!(a&8),u=!!(a&16),m=!!(a&32),l=!!(a&65536),f=!!(a&131072),g=this.isobmffReader.readU32(),b=this.tracks.find(k=>k.id===g);if(!b)break;let p=this.fragmentTrackDefaults.find(k=>k.trackId===g);this.currentTrack=b,b.currentFragmentState={baseDataOffset:this.currentFragment.implicitBaseDataOffset,sampleDescriptionIndex:p?.defaultSampleDescriptionIndex??null,defaultSampleDuration:p?.defaultSampleDuration??null,defaultSampleSize:p?.defaultSampleSize??null,defaultSampleFlags:p?.defaultSampleFlags??null,startTimestamp:null},n?b.currentFragmentState.baseDataOffset=this.isobmffReader.readU64():f&&(b.currentFragmentState.baseDataOffset=this.currentFragment.moofOffset),o&&(b.currentFragmentState.sampleDescriptionIndex=this.isobmffReader.readU32()),c&&(b.currentFragmentState.defaultSampleDuration=this.isobmffReader.readU32()),u&&(b.currentFragmentState.defaultSampleSize=this.isobmffReader.readU32()),m&&(b.currentFragmentState.defaultSampleFlags=this.isobmffReader.readU32()),l&&(b.currentFragmentState.defaultSampleDuration=0)}break;case"tfdt":{let a=this.currentTrack;if(!a)break;d(a.currentFragmentState);let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=n===0?this.isobmffReader.readU32():this.isobmffReader.readU64();a.currentFragmentState.startTimestamp=o}break;case"trun":{let a=this.currentTrack;if(!a)break;if(d(this.currentFragment),d(a.currentFragmentState),this.currentFragment.trackData.has(a.id))throw new Error("Can't have two trun boxes for the same track in one fragment.");let n=this.isobmffReader.readU8(),o=this.isobmffReader.readU24(),c=!!(o&1),u=!!(o&4),m=!!(o&256),l=!!(o&512),f=!!(o&1024),g=!!(o&2048),b=this.isobmffReader.readU32(),p=a.currentFragmentState.baseDataOffset;c&&(p+=this.isobmffReader.readI32());let k=null;u&&(k=this.isobmffReader.readU32());let w=p;if(b===0){this.currentFragment.implicitBaseDataOffset=w;break}let v=0,T={startTimestamp:0,endTimestamp:0,samples:[],presentationTimestamps:[],startTimestampIsFinal:!1};this.currentFragment.trackData.set(a.id,T);for(let z=0;z({presentationTimestamp:z.presentationTimestamp,sampleIndex:V})).sort((z,V)=>z.presentationTimestamp-V.presentationTimestamp);let A=T.samples[T.presentationTimestamps[0].sampleIndex],F=T.samples[R(T.presentationTimestamps).sampleIndex];T.startTimestamp=A.presentationTimestamp,T.endTimestamp=F.presentationTimestamp+F.duration,this.currentFragment.implicitBaseDataOffset=w}break}this.isobmffReader.pos=s}},lt=class{constructor(t){this.internalTrack=t;this.chunkToSampleIndex=new WeakMap;this.chunkToFragmentLocation=new WeakMap}getCodec(){throw new Error("Not implemented on base class.")}async computeDuration(){let e=(await this.getChunk(1/0,{metadataOnly:!0}))?.timestamp;return e?e/1e6:0}async getFirstChunk(t){return this.internalTrack.demuxer.isFragmented?this.performFragmentedLookup(()=>{let e=this.internalTrack.fragments[0];return{fragmentIndex:e?0:-1,sampleIndex:e?0:-1,correctSampleFound:!!e}},0,1/0,t):this.fetchChunkForSampleIndex(0,t)}roundToMicrosecond(t){return(Math.floor(t*1e6)+.99999999)/1e6}async getChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findSampleInFragmentsForTimestamp(r),r,r,e);{let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=pr(s,r);return this.fetchChunkForSampleIndex(a,e)}}async getNextChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let s=this.chunkToFragmentLocation.get(t);if(s===void 0)throw new Error("Chunk was not created from this track.");let a=s.fragment.trackData.get(this.internalTrack.id),n=a.samples[s.sampleIndex],o=H(this.internalTrack.fragments,s.fragment.moofOffset,c=>c.moofOffset);return d(o!==-1),this.performFragmentedLookup(()=>{if(s.sampleIndex+1l.moofOffset);return d(m!==-1),{fragmentIndex:m,sampleIndex:0,correctSampleFound:!0}}return{fragmentIndex:o,sampleIndex:-1,correctSampleFound:!1}}},n.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");return this.fetchChunkForSampleIndex(r+1,e)}async getKeyChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findKeySampleInFragmentsForTimestamp(r),r,r,e);let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=pr(s,r),n=a===-1?-1:Di(s,a);return this.fetchChunkForSampleIndex(n,e)}async getNextKeyChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let n=this.chunkToFragmentLocation.get(t);if(n===void 0)throw new Error("Chunk was not created from this track.");let o=n.fragment.trackData.get(this.internalTrack.id),c=o.samples[n.sampleIndex],u=H(this.internalTrack.fragments,n.fragment.moofOffset,m=>m.moofOffset);return d(u!==-1),this.performFragmentedLookup(()=>{let m=o.samples.findIndex((l,f)=>l.isKeyFrame&&f>n.sampleIndex);if(m!==-1)return{fragmentIndex:u,sampleIndex:m,correctSampleFound:!0};{let l=n.fragment;for(;l.nextFragment;){l=l.nextFragment;let f=l.trackData.get(this.internalTrack.id);if(f){let g=H(this.internalTrack.fragments,l.moofOffset,p=>p.moofOffset);d(g!==-1);let b=f.samples.findIndex(p=>p.isKeyFrame);if(b===-1)throw new Error("Not supported: Fragment does not contain key sample.");return{fragmentIndex:g,sampleIndex:b,correctSampleFound:!0}}}return{fragmentIndex:u,sampleIndex:-1,correctSampleFound:!1}}},c.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");let s=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=Pi(s,r);return this.fetchChunkForSampleIndex(a,e)}async fetchChunkForSampleIndex(t,e){if(t===-1)return null;let r=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),s=Vi(r,t);if(!s)return null;let a;e.metadataOnly?a=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(s.chunkOffset,s.chunkOffset+s.chunkSize),a=this.internalTrack.demuxer.chunkReader.readRange(s.sampleOffset,s.sampleOffset+s.sampleSize));let n=1e6*s.presentationTimestamp/this.internalTrack.timescale,o=1e6*s.duration/this.internalTrack.timescale,c=this.createChunk(a,n,o,s.isKeyFrame);return this.chunkToSampleIndex.set(c,t),c}async fetchChunkInFragment(t,e,r){if(e===-1)return null;let a=t.trackData.get(this.internalTrack.id).samples[e];d(a);let n;r.metadataOnly?n=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(t.dataStart,t.dataEnd),n=this.internalTrack.demuxer.chunkReader.readRange(a.byteOffset,a.byteOffset+a.byteSize));let o=1e6*a.presentationTimestamp/this.internalTrack.timescale,c=1e6*a.duration/this.internalTrack.timescale,u=this.createChunk(n,o,c,a.isKeyFrame);return this.chunkToFragmentLocation.set(u,{fragment:t,sampleIndex:e}),u}findSampleInFragmentsForTimestamp(t){let e=I(this.internalTrack.fragments,t,a=>a.trackData.get(this.internalTrack.id).startTimestamp),r=-1,s=!1;if(e!==-1){let n=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=I(n.presentationTimestamps,t,c=>c.presentationTimestamp);d(o!==-1),r=n.presentationTimestamps[o].sampleIndex,s=ta.trackData.get(this.internalTrack.id).startTimestamp),r=-1,s=!1;if(e!==-1){let n=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=Nt(n.presentationTimestamps,u=>n.samples[u.sampleIndex].isKeyFrame&&u.presentationTimestamp<=t);if(o===-1)throw new Error("Not supported: Fragment does not begin with a key sample.");r=n.presentationTimestamps[o].sampleIndex,s=tw.timestamp);k!==-1&&(p=this.internalTrack.fragmentLookupTable[k])}if(o===-1)m.pos=p?.moofOffset??0;else{let k=this.internalTrack.fragments[o];!p||k.moofOffset>=k.moofOffset?(m.pos=k.moofOffset+k.moofSize,f=k):m.pos=p.moofOffset}for(;m.posr)break;if(f.nextFragment){m.pos=f.nextFragment.moofOffset+f.nextFragment.moofSize,f=f.nextFragment;continue}}await m.reader.loadRange(m.pos,m.pos+16);let k=m.pos,w=m.readBoxHeader();if(w.name==="moof"){let v=H(a.fragments,k,T=>T.moofOffset);if(v===-1){m.pos=k;let T=await a.readFragment();f&&(f.nextFragment=T),f=T;let{fragmentIndex:A,sampleIndex:F,correctSampleFound:z}=t();if(z){let V=this.internalTrack.fragments[A];return this.fetchChunkInFragment(V,F,s)}A!==-1&&(g=A,b=F)}else{let T=a.fragments[v];f&&(f.nextFragment=T),f=T}}m.pos=k+w.totalSize}if(g!==-1){let k=this.internalTrack.fragments[g];return this.fetchChunkInFragment(k,b,s)}return null}finally{n()}}},Et=class extends lt{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getCodedWidth(){return this.internalTrack.info.width}async getCodedHeight(){return this.internalTrack.info.height}async getRotation(){return this.internalTrack.rotation}async getDecoderConfig(){return{codec:ar(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),codedWidth:this.internalTrack.info.width,codedHeight:this.internalTrack.info.height,description:this.internalTrack.info.codecDescription??void 0,colorSpace:this.internalTrack.info.colorSpace??void 0}}createChunk(t,e,r,s){return new EncodedVideoChunk({data:t,timestamp:e,duration:r,type:s?"key":"delta"})}},Ft=class extends lt{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getNumberOfChannels(){return this.internalTrack.info.numberOfChannels}async getSampleRate(){return this.internalTrack.info.sampleRate}async getDecoderConfig(){return{codec:or(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),numberOfChannels:this.internalTrack.info.numberOfChannels,sampleRate:this.internalTrack.info.sampleRate,description:this.internalTrack.info.codecDescription??void 0}}createChunk(t,e,r,s){return new EncodedAudioChunk({data:t,timestamp:e,duration:r,type:s?"key":"delta"})}},pr=(i,t)=>{let e=I(i.presentationTimestamps,t,r=>r.presentationTimestamp);return e===-1?-1:i.presentationTimestamps[e].sampleIndex},Vi=(i,t)=>{let e=I(i.sampleTimingEntries,t,p=>p.startIndex),r=i.sampleTimingEntries[e];if(!r||r.startIndex+r.count<=t)return null;let a=r.startDecodeTimestamp+(t-r.startIndex)*r.delta,n=I(i.sampleCompositionTimeOffsets,t,p=>p.startIndex),o=i.sampleCompositionTimeOffsets[n];o&&(a+=o.offset);let c=i.sampleSizes[Math.min(t,i.sampleSizes.length-1)],u=I(i.sampleToChunk,t,p=>p.startSampleIndex),m=i.sampleToChunk[u];d(m);let l=m.startChunkIndex+Math.floor((t-m.startSampleIndex)/m.samplesPerChunk),f=i.chunkOffsets[l],g=0,b=f;if(i.sampleSizes.length===1)b+=c*(t-m.startSampleIndex),g+=c*m.samplesPerChunk;else{let p=m.startSampleIndex+(l-m.startChunkIndex)*m.samplesPerChunk;for(let k=p;kp)!==-1:!0}},Di=(i,t)=>{if(!i.keySampleIndices)return t;let e=I(i.keySampleIndices,t,r=>r);return i.keySampleIndices[e]??-1},Pi=(i,t)=>{if(!i.keySampleIndices)return t+1;let e=I(i.keySampleIndices,t,r=>r);return i.keySampleIndices[e+1]??-1},hr=(i,t)=>{i.startTimestamp+=t,i.endTimestamp+=t;for(let e of i.samples)e.presentationTimestamp+=t;for(let e of i.presentationTimestamps)e.presentationTimestamp+=t};var he=class{},Ae=class extends he{async _canReadInput(t){if(await t._mainReader.source._getSize()<8)return!1;let r=new ne(t._mainReader);return r.pos=4,r.readAscii(4)==="ftyp"}_createDemuxer(t){return new dt(t)}},Re=class extends he{async _canReadInput(){return!1}_createDemuxer(){throw new Error("Not implemented")}},Oe=new Ae,br=Oe,kr=Oe,ft=new Re,Mt=ft,gr=ft,Tr=[Oe,Mt];var pt=class{constructor(t){this._demuxerPromise=null;this._format=null;this._formats=t.formats,this._source=t.source,this._mainReader=new pe(t.source)}_getDemuxer(){return this._demuxerPromise??=(async()=>{await this._mainReader.loadRange(0,4096);for(let t of this._formats)if(await t._canReadInput(this))return this._format=t,t._createDemuxer(this);throw new Error("Input has an unrecognizable format.")})()}async getFormat(){return await this._getDemuxer(),d(this._format),this._format}async computeDuration(){return(await this._getDemuxer()).computeDuration()}async getTracks(){return(await this._getDemuxer()).getTracks()}async getVideoTracks(){return(await this.getTracks()).filter(e=>e.isVideoTrack())}async getPrimaryVideoTrack(){return(await this.getTracks()).find(e=>e.isVideoTrack())??null}async getAudioTracks(){return(await this.getTracks()).filter(e=>e.isAudioTrack())}async getPrimaryAudioTrack(){return(await this.getTracks()).find(e=>e.isAudioTrack())??null}async getMimeType(){return(await this._getDemuxer()).getMimeType()}};var be=class{async*chunks(t,e=1/0){let r=[],{promise:s,resolve:a}=E(),{promise:n,resolve:o}=E(),c=!1,u=[],m=()=>Math.max(2,u.length);(async()=>{let l=t??await this.getFirstChunk();for(;l&&!c&&!(l.timestamp/1e6>=e);){if(r.length>m()){({promise:n,resolve:o}=E()),await n;continue}r.push(l),a(),{promise:s,resolve:a}=E(),l=await this.getNextChunk(l)}c=!0,a()})();try{for(;;)if(r.length>0){yield r.shift();let l=performance.now();for(u.push(l);u.length>0&&l-u[0]>=1e3;)u.shift();o()}else if(!c)await s;else break}finally{c=!0,o()}}},ke=class{_duplicateFrame(t){return structuredClone(t)}async*mediaFramesAtTimestamps(t){let e=Ht(t),r=[],s=[],{promise:a,resolve:n}=E(),{promise:o,resolve:c}=E(),u=!1,m=!1,l=8,f=null,g=p=>{s.push(p),n(),{promise:a,resolve:n}=E()},b=await this._createDecoder(p=>{if(c(),m){p.close();return}let k=!1;for(;r.length>0&&r[0]===p.timestamp;)g(this._duplicateFrame(p)),r.shift(),k=!0;k?(f?.close(),f=p):p.close()});(async()=>{let p=this._createChunkDrain(),k=null,w=null;for await(let v of e){for(;s.length+b.decodeQueueSize>l;)({promise:o,resolve:c}=E()),await o;if(m)break;let T=await p.getChunk(v);if(!T){g(null);continue}let A=await p.getKeyChunk(v);if(!A){g(null);continue}for(r.push(T.timestamp),k&&A.timestamp===k.timestamp&&T.timestamp>=w.timestamp?(d(w),T.timestamp===w.timestamp&&r.length===1&&(f&&g(this._duplicateFrame(f)),r.shift())):(k=A,w=A,b.decode(A));w.timestamp!==T.timestamp;){let F=await p.getNextChunk(w);d(F),w=F,b.decode(F)}b.decodeQueueSize>=10&&await new Promise(F=>b.addEventListener("dequeue",F,{once:!0}))}await b.flush(),b.close(),u=!0,n()})();try{for(;;)if(s.length>0){let p=s.shift();d(p!==void 0),yield p,c()}else if(!u)await a;else break}finally{m=!0,c();for(let p of s)p?.close();f?.close()}}async*mediaFramesInRange(t=0,e=1/0){let r=[],s=!1,a=null,{promise:n,resolve:o}=E(),{promise:c,resolve:u}=E(),m=!1,l=!1,f=8,g=await this._createDecoder(k=>{u();let w=k.timestamp/1e6;if(w>=e&&(l=!0),l){k.close();return}a&&(w>t?(r.push(a),s=!0):a.close()),w>=t&&(r.push(k),s=!0),a=s?null:k,r.length>0&&(o(),{promise:n,resolve:o}=E())}),b=this._createChunkDrain(),p=await b.getKeyChunk(t)??await b.getFirstChunk();if(p){(async()=>{let k=p,w=1/0;if(e<1/0){let T=await b.getChunk(e),A=T?T.type==="key"&&T.timestamp/1e6===e?T:await b.getNextKeyChunk(T):null;A&&(w=A.timestamp/1e6)}let v=b.chunks(p,w);for(await v.next();k&&!l;){if(r.length+g.decodeQueueSize>f){({promise:c,resolve:u}=E()),await c;continue}g.decode(k);let T=await v.next();if(T.done)break;k=T.value}await v.return(),await g.flush(),g.close(),!s&&a&&r.push(a),m=!0,o()})();try{for(;;)if(r.length>0)yield r.shift(),u();else if(!m)await n;else break}finally{l=!0,u();for(let k of r)k.close()}}}},Ee=class extends be{constructor(t){super(),this._videoTrack=t}getFirstChunk(t={}){return this._videoTrack._backing.getFirstChunk(t)}getChunk(t,e={}){return this._videoTrack._backing.getChunk(t,e)}getNextChunk(t,e={}){return this._videoTrack._backing.getNextChunk(t,e)}getKeyChunk(t,e={}){return this._videoTrack._backing.getKeyChunk(t,e)}getNextKeyChunk(t,e={}){return this._videoTrack._backing.getNextKeyChunk(t,e)}},Fe=class extends ke{constructor(e){super();this._decoderConfig=null;this._videoTrack=e}async _createDecoder(e){this._decoderConfig??=await this._videoTrack.getDecoderConfig();let r=new VideoDecoder({output:e,error:s=>console.error(s)});return r.configure(this._decoderConfig),r}_createChunkDrain(){return new Ee(this._videoTrack)}async getFrame(e){for await(let r of this.mediaFramesAtTimestamps([e]))return r;throw new Error("Internal error: Iterator returned nothing.")}frames(e=0,r=1/0){return this.mediaFramesInRange(e,r)}framesAtTimestamps(e){return this.mediaFramesAtTimestamps(e)}},ht=class{constructor(t,e){this._videoTrack=t,this._dimensions=e,this._videoFrameDrain=new Fe(t)}async _videoFrameToWrappedCanvas(t){let e=this._dimensions?.width??await this._videoTrack.getDisplayWidth(),r=this._dimensions?.height??await this._videoTrack.getDisplayHeight(),s=await this._videoTrack.getRotation(),a=document.createElement("canvas");a.width=e,a.height=r;let n=a.getContext("2d",{alpha:!1});d(n),n.translate(e/2,r/2),n.rotate(s*Math.PI/180),n.translate(-e/2,-r/2);let[o,c]=s%180===0?[e,r]:[r,e];n.drawImage(t,(e-o)/2,(r-c)/2,o,c);let u={canvas:a,timestamp:t.timestamp/1e6,duration:(t.duration??0)/1e6};return t.close(),u}async getCanvas(t){let e=await this._videoFrameDrain.getFrame(t);return e&&this._videoFrameToWrappedCanvas(e)}async*canvases(t=0,e=1/0){for await(let r of this._videoFrameDrain.frames(t,e))yield this._videoFrameToWrappedCanvas(r)}async*canvasesAtTimestamps(t){for await(let e of this._videoFrameDrain.framesAtTimestamps(t))yield e&&this._videoFrameToWrappedCanvas(e)}},Me=class extends be{constructor(t){super(),this._audioTrack=t}getFirstChunk(t={}){return this._audioTrack._backing.getFirstChunk(t)}getChunk(t,e={}){return this._audioTrack._backing.getChunk(t,e)}getNextChunk(t,e={}){return this._audioTrack._backing.getNextChunk(t,e)}getKeyChunk(t,e={}){return this._audioTrack._backing.getKeyChunk(t,e)}getNextKeyChunk(t,e={}){return this._audioTrack._backing.getNextKeyChunk(t,e)}},Ve=class extends ke{constructor(e){super();this._decoderConfig=null;this._audioTrack=e}async _createDecoder(e){this._decoderConfig??=await this._audioTrack.getDecoderConfig();let r=new AudioDecoder({output:e,error:s=>console.error(s)});return r.configure(this._decoderConfig),r}_createChunkDrain(){return new Me(this._audioTrack)}async getData(e){for await(let r of this.mediaFramesAtTimestamps([e]))return r;throw new Error("Internal error: Iterator returned nothing.")}data(e=0,r=1/0){return this.mediaFramesInRange(e,r)}dataAtTimestamps(e){return this.mediaFramesAtTimestamps(e)}},bt=class{constructor(t){this._audioDataDrain=new Ve(t)}_audioDataToWrappedArrayBuffer(t){let e=new AudioBuffer({numberOfChannels:t.numberOfChannels,length:t.numberOfFrames,sampleRate:t.sampleRate}),r=new Float32Array(t.allocationSize({planeIndex:0,format:"f32-planar"})/4);for(let n=0;nr.track===e))return;e:for(;;){let e=null,r=1/0;for(let n of this.trackDatas){if(n.chunkQueue.length===0&&!n.track.source._closed)break e;n.chunkQueue.length>0&&n.chunkQueue[0].timestamp=2&&a++;let u={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];Pt(r.data,a+0,a+3,u)}createInternalChunk(e,r,a,n,s=null){return{data:e,type:n,timestamp:r,duration:a,additions:s}}writeBlock(e,r){this.segment||(this.createTracks(),this.createSegment());let a=Math.floor(1e3*r.timestamp),n=this.trackDatas.every(l=>{if(l.track.source._closed)return!0;if(e===l)return r.type==="key";let f=l.chunkQueue[0];return f&&f.type==="key"});(!this.currentCluster||n&&a-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(a);let s=a-this.currentClusterMsTimestamp;if(s<0)return;if(s>=Ft)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${Ft} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${Ft} milliseconds.`);let c=new Uint8Array(4),u=new DataView(c.buffer);u.setUint8(0,128|e.track.id),u.setInt16(1,s,!1);let d=Math.floor(1e3*r.duration);if(d===0&&!r.additions){u.setUint8(3,+(r.type==="key")<<7);let l={id:163,data:[c,r.data]};this.writeEBML(l)}else{let l={id:160,data:[{id:161,data:[c,r.data]},r.type==="delta"?{id:251,data:new Ie(e.lastWrittenMsTimestamp-a)}:null,r.additions?{id:30113,data:[{id:166,data:[{id:165,data:r.additions},{id:238,data:1}]}]}:null,d>0?{id:155,data:d}:null]};this.writeEBML(l)}this.duration=Math.max(this.duration,a+d),e.lastWrittenMsTimestamp=a,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:br,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){m(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),r=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,br),this.writer.seek(r);let a=this.offsets.get(this.currentCluster)-this.segmentDataOffset;m(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(n=>({id:183,data:[{id:247,data:n.track.id},{id:241,data:a}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let r of this.trackDatas)for(;r.chunkQueue.length>0;)this.writeBlock(r,r.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),m(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let r=this.writer.getPos(),a=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(a,pr),this.segmentDuration.data=new pe(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(r)}e()}};var G=class{},Je=class extends G{constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(t.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=t}_createMuxer(t){return new Ye(t,this)}},_e=class extends G{constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.streamable!==void 0&&typeof t.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=t}_createMuxer(t){return new Ze(t,this)}},oe=class extends _e{};var ce=class{constructor(){this._connectedTrack=null;this._closed=!1;this._offsetTimestamps=!1}_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},L=class extends ce{constructor(e){super();this._connectedTrack=null;if(!ne.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${ne.join(", ")}.`);this._codec=e}},et=class extends L{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,t,e)}},Vi=5,Mi=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!ne.includes(i.codec))throw new TypeError(`Invalid video codec '${i.codec}'. Must be one of: ${ne.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(i.latencyMode!==void 0&&!["quality","realtime"].includes(i.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},Ae=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastMultipleOfKeyFrameInterval=-1;this.lastWidth=null;this.lastHeight=null;Mi(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(t.codedWidth!==this.lastWidth||t.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${t.codedWidth}x${t.codedHeight}.`)}else this.lastWidth=t.codedWidth,this.lastHeight=t.codedHeight;this.ensureEncoder(t),m(this.encoder);let e=Math.floor(t.timestamp/1e6/Vi);this.encoder.encode(t,{keyFrame:e!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=e,this.encoder.encodeQueueSize>=4&&await new Promise(r=>this.encoder.addEventListener("dequeue",r,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new VideoEncoder({output:(e,r)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,e,r),error:e=>console.error("Video encode error:",e)}),this.encoder.configure({codec:or(this.codecConfig.codec,t.codedWidth,t.codedHeight,this.codecConfig.bitrate),width:t.codedWidth,height:t.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...mr(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},tt=class extends L{constructor(t){super(t.codec),this._encoder=new Ae(this,t)}digest(t){if(!(t instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},rt=class extends L{constructor(t,e){if(!(t instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(e.codec),this._encoder=new Ae(this,e),this._canvas=t}digest(t,e=0){if(!Number.isFinite(t)||t<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(e)||e<0)throw new TypeError("duration must be a non-negative number.");let r=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*t),duration:Math.round(1e6*e),alpha:"discard"}),a=this._encoder.digest(r);return r.close(),a}_flush(){return this._encoder.flush()}},it=class extends L{constructor(e,r){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");r={...r,latencyMode:"realtime"};super(r.codec);this._abortController=null;this._offsetTimestamps=!0;this._encoder=new Ae(this,r),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),r=new WritableStream({write:a=>{this._encoder.digest(a),a.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(a=>{a instanceof DOMException&&a.name==="AbortError"||console.error("Pipe error:",a)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},Q=class extends ce{constructor(e){super();this._connectedTrack=null;if(!se.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${se.join(", ")}.`);this._codec=e}},at=class extends Q{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,t,e)}},Di=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!se.includes(i.codec))throw new TypeError(`Invalid audio codec '${i.codec}'. Must be one of: ${se.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},Re=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastNumberOfChannels=null;this.lastSampleRate=null;Di(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(t.numberOfChannels!==this.lastNumberOfChannels||t.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${t.numberOfChannels} channels at ${t.sampleRate} Hz.`)}else this.lastNumberOfChannels=t.numberOfChannels,this.lastSampleRate=t.sampleRate;this.ensureEncoder(t),m(this.encoder),this.encoder.encode(t),this.encoder.encodeQueueSize>=4&&await new Promise(e=>this.encoder.addEventListener("dequeue",e,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new AudioEncoder({output:(e,r)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,e,r),error:e=>console.error("Audio encode error:",e)}),this.encoder.configure({codec:ur(this.codecConfig.codec,t.numberOfChannels,t.sampleRate),numberOfChannels:t.numberOfChannels,sampleRate:t.sampleRate,bitrate:this.codecConfig.bitrate,...lr(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},nt=class extends Q{constructor(t){super(t.codec),this._encoder=new Re(this,t)}digest(t){if(!(t instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},st=class extends Q{constructor(e){super(e.codec);this._accumulatedFrameCount=0;this._encoder=new Re(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let r=e.numberOfChannels,a=e.sampleRate,n=e.length,s=new Float32Array(r*n);for(let u=0;u{this._encoder.digest(a),a.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(a=>{a instanceof DOMException&&a.name==="AbortError"||console.error("Pipe error:",a)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},ue=class extends ce{constructor(e){super();this._connectedTrack=null;if(!Se.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${Se.join(", ")}.`);this._codec=e}},ct=class extends ue{constructor(t){super(t),this._parser=new Ne({codec:t,output:(e,r)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,e,r),error:e=>console.error("Subtitle parse error:",e)})}digest(t){if(typeof t!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(t),this._connectedTrack.output._muxer.mutex.currentPromise}};var ut=class{constructor(t){this._tracks=[];this._started=!1;this._finalizing=!1;this._mutex=new $;if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(!(t.format instanceof G))throw new TypeError("options.format must be an OutputFormat.");if(!(t.target instanceof X))throw new TypeError("options.target must be a Target.");if(t.target._output)throw new Error("Target is already used for another output.");t.target._output=this,this._writer=t.target._createWriter(),this._muxer=t.format._createMuxer(this)}addVideoTrack(t,e={}){if(!(t instanceof L))throw new TypeError("source must be a VideoSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");if(typeof e.rotation=="number"&&![0,90,180,270].includes(e.rotation))throw new TypeError(`Invalid video rotation: ${e.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(e.rotation)&&(e.rotation.length!==9||e.rotation.some(r=>!Number.isFinite(r))))throw new TypeError(`Invalid video transformation matrix: ${e.rotation.join()}`);if(e.frameRate!==void 0&&(!Number.isInteger(e.frameRate)||e.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${e.frameRate}. Must be a positive integer.`);this._addTrack("video",t,e)}addAudioTrack(t,e={}){if(!(t instanceof Q))throw new TypeError("source must be an AudioSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",t,e)}addSubtitleTrack(t,e={}){if(!(t instanceof ue))throw new TypeError("source must be a SubtitleSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",t,e)}_addTrack(t,e,r){if(this._started)throw new Error("Cannot add track after output has started.");if(e._connectedTrack)throw new Error("Source is already used for a track.");let a={id:this._tracks.length+1,output:this,type:t,source:e,metadata:r};this._muxer.beforeTrackAdd(a),this._tracks.push(a),e._connectedTrack=a}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let t=await this._mutex.acquire();await this._muxer.start();for(let e of this._tracks)e.source._start();t()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let t=await this._mutex.acquire(),e=this._tracks.map(r=>r.source._flush());await Promise.all(e),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),t()}};var Y=class{constructor(){this._sizePromise=null}_getSize(){return this._sizePromise??=this._retrieveSize()}},dt=class extends Y{constructor(t){if(!(t instanceof ArrayBuffer)&&!(t instanceof Uint8Array))throw new TypeError("buffer must be an ArrayBuffer or Uint8Array.");super(),this._bytes=t instanceof Uint8Array?t:new Uint8Array(t)}async _read(t,e){return this._bytes.subarray(t,e)}async _retrieveSize(){return this._bytes.byteLength}},mt=class extends Y{constructor(t){if(!(t instanceof Blob))throw new TypeError("blob must be a Blob.");super(),this._blob=t}async _read(t,e){let a=await this._blob.slice(t,e).arrayBuffer();return new Uint8Array(a)}async _retrieveSize(){return this._blob.size}};var lt=class{constructor(t){this.input=t}};var be=class{constructor(t){this._backing=t}isVideoTrack(){return this instanceof z}isAudioTrack(){return this instanceof U}computeDuration(){return this._backing.computeDuration()}},z=class extends be{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getCodedWidth(){return this._backing.getCodedWidth()}getCodedHeight(){return this._backing.getCodedHeight()}getRotation(){return this._backing.getRotation()}async getDisplayWidth(){return await this._backing.getRotation()%180===0?this._backing.getCodedWidth():this._backing.getCodedHeight()}async getDisplayHeight(){return await this._backing.getRotation()%180===0?this._backing.getCodedHeight():this._backing.getCodedWidth()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},U=class extends be{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var ke=class{constructor(t,e=1/0){this.source=t;this.maxStorableBytes=e;this.loadedSegments=[];this.loadingSegments=[];this.sourceSizePromise=null;this.nextAge=0;this.totalStoredBytes=0}async loadRange(t,e){e=Math.min(e,await this.source._getSize());let r=this.loadingSegments.find(c=>c.start<=t&&c.end>=e);if(r){await r.promise;return}if(this.loadedSegments.some(c=>c.start<=t&&c.end>=e))return;let n=this.source._read(t,e),s={start:t,end:e,promise:n};this.loadingSegments.push(s);let o=await n;Ht(this.loadingSegments,s),this.insertIntoLoadedSegments(t,o)}insertIntoLoadedSegments(t,e){let r={start:t,end:t+e.byteLength,bytes:e,view:new DataView(e.buffer),age:this.nextAge++},a=_(this.loadedSegments,t,n=>n.start);(a===-1||this.loadedSegments[a].start=r.end)break;r.start<=s.start&&s.end<=r.end&&(this.loadedSegments.splice(n,1),n--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let n=null,s=-1;for(let o=0;on.start),a=null;if(r!==-1)for(let n=r;nt)break;if(e<=s.end){a=s;break}}if(!a)throw new Error(`No segment loaded for range [${t}, ${e}).`);return a.age=this.nextAge++,{view:a.view,offset:a.bytes.byteOffset+t-a.start}}forgetRange(t,e){if(e<=t)return;let r=_(this.loadedSegments,t,n=>n.start);if(r===-1)return;let a=this.loadedSegments[r];a.start!==t||a.end!==e||(this.loadedSegments.splice(r,1),this.totalStoredBytes-=a.bytes.byteLength)}};var de=class{constructor(t){this.reader=t;this.pos=0}readRange(t,e){let{view:r,offset:a}=this.reader.getViewAndOffset(t,e);return new Uint8Array(r.buffer,a,e-t)}readU8(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,t.getUint8(e)}readU16(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,t.getUint16(e,!1)}readU24(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let r=t.getUint16(e,!1),a=t.getUint8(e+2);return r*256+a}readS32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getUint32(e,!1)}readI32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU64(){let t=this.readU32(),e=this.readU32();return t*4294967296+e}readF64(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,t.getFloat64(e,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(t){let{view:e,offset:r}=this.reader.getViewAndOffset(this.pos,this.pos+t);this.pos+=t;let a="";for(let n=0;na.computeDuration()));return Math.max(0,...r)}async getTracks(){return await this.readMetadata(),this.tracks.map(e=>e.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let r=await Promise.all(this.tracks.map(n=>n.inputTrack.getCodecMimeType())),a=[...new Set(r)];e+=`; codecs="${a.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.pos=0&&aa.presentationTimestamp-n.presentationTimestamp),e.sampleTable}async readFragment(){let e=this.isobmffReader.pos;await this.isobmffReader.reader.loadRange(this.isobmffReader.pos,this.isobmffReader.pos+16);let r=this.isobmffReader.readBoxHeader();m(r.name==="moof"),await this.isobmffReader.reader.loadRange(e,e+r.totalSize),this.isobmffReader.pos=e,this.traverseBox();let a=j(this.fragments,e,s=>s.moofOffset);m(a!==-1);let n=this.fragments[a];m(n.moofOffset===e),this.isobmffReader.reader.forgetRange(e,e+r.totalSize);for(let[s,o]of n.trackData){if(o.startTimestampIsFinal)continue;let c=this.tracks.find(f=>f.id===s);this.isobmffReader.pos=0;let u=null,d=null,l=_(c.fragments,e-1,f=>f.moofOffset);for(l!==-1&&(u=c.fragments[l],d=u,this.isobmffReader.pos=u.moofOffset+u.moofSize);this.isobmffReader.posh.moofOffset);if(b===-1){this.isobmffReader.pos=f;let h=await this.readFragment();u&&(u.nextFragment=h),u=h}else{let h=this.fragments[b];u&&(u.nextFragment=h),u=h}}this.isobmffReader.pos=f+g.totalSize}u&&u.trackData.has(s)&&(d=u)}if(d){let f=d.trackData.get(s);m(f.startTimestampIsFinal),gr(o,f.endTimestamp)}o.startTimestampIsFinal=!0}return n}readContiguousBoxes(e){let r=this.isobmffReader.pos;for(;this.isobmffReader.pos-rl.every((f,g)=>f===u[g]));d===-1?n.rotation=0:n.rotation=90*d}break;case"mdhd":{let n=this.currentTrack;m(n);let s=this.isobmffReader.readU8();this.isobmffReader.pos+=3,s===0?(this.isobmffReader.pos+=8,n.timescale=this.isobmffReader.readU32(),n.durationInTimescale=this.isobmffReader.readU32()):s===1&&(this.isobmffReader.pos+=16,n.timescale=this.isobmffReader.readU32(),n.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let n=this.currentTrack;m(n),this.isobmffReader.pos+=8;let s=this.isobmffReader.readAscii(4);s==="vide"?n.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:s==="soun"&&(n.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let n=this.currentTrack;m(n),n.sampleTableOffset=e,this.readContiguousBoxes(r.contentSize)}break;case"stsd":{let n=this.currentTrack;if(m(n),n.info===null||n.sampleTable)break;let s=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=this.isobmffReader.readU32();for(let c=0;c0){if(d===1)this.isobmffReader.pos+=4*4;else if(d===2){this.isobmffReader.pos+=4,f=this.isobmffReader.readF64(),l=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),b=this.isobmffReader.readU32(),h=this.isobmffReader.readU32(),k=this.isobmffReader.readU32()}}n.info.numberOfChannels=l,n.info.sampleRate=f,this.readContiguousBoxes(e+u.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let n=this.currentTrack;m(n&&n.info),n.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"hvcC":{let n=this.currentTrack;m(n&&n.info),n.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"colr":{let n=this.currentTrack;if(m(n&&n.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let o=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),u=this.isobmffReader.readU16(),d=!!(this.isobmffReader.readU8()&128);n.info.colorSpace={primaries:zt[o],transfer:Ut[c],matrix:Bt[u],fullRange:d}}break;case"wave":r.totalSize>8&&this.readContiguousBoxes(r.contentSize);break;case"esds":{let n=this.currentTrack;m(n&&n.info),this.isobmffReader.pos+=4;let s=this.isobmffReader.readU8();m(s===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let o=this.isobmffReader.readU8(),c=(o&128)!==0,u=(o&64)!==0,d=(o&32)!==0;if(c&&(this.isobmffReader.pos+=2),u){let h=this.isobmffReader.readU8();this.isobmffReader.pos+=h}d&&(this.isobmffReader.pos+=2);let l=this.isobmffReader.readU8();m(l===4),this.isobmffReader.readIsomVariableInteger();let f=this.isobmffReader.readU8();m(f===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();m(g===5);let b=this.isobmffReader.readIsomVariableInteger();n.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+b)}break;case"stts":{let n=this.currentTrack;if(m(n),!n.sampleTable)break;this.isobmffReader.pos+=4;let s=this.isobmffReader.readU32(),o=0,c=0;for(let u=0;uv.id===s);if(!o)break;o.fragmentLookupTable=[];let c=this.isobmffReader.readU32(),u=(c&48)>>4,d=(c&12)>>2,l=c&3,f=this.isobmffReader,g=[f.readU8.bind(f),f.readU16.bind(f),f.readU24.bind(f),f.readU32.bind(f)],b=g[u],h=g[d],k=g[l],y=this.isobmffReader.readU32();for(let v=0;vs.moofOffset);this.fragments.splice(n+1,0,this.currentFragment);for(let[,s]of this.currentFragment.trackData){let o=s.samples[0],c=R(s.samples);this.currentFragment.dataStart=Math.min(this.currentFragment.dataStart,o.byteOffset),this.currentFragment.dataEnd=Math.max(this.currentFragment.dataEnd,c.byteOffset+c.byteSize)}this.currentFragment=null}break;case"traf":if(m(this.currentFragment),this.readContiguousBoxes(r.contentSize),this.currentTrack){let n=this.currentFragment.trackData.get(this.currentTrack.id);if(n){let s=_(this.currentTrack.fragments,this.currentFragment.moofOffset,c=>c.moofOffset);this.currentTrack.fragments.splice(s+1,0,this.currentFragment);let{currentFragmentState:o}=this.currentTrack;m(o),o.startTimestamp!==null&&(gr(n,o.startTimestamp),n.startTimestampIsFinal=!0)}this.currentTrack.currentFragmentState=null,this.currentTrack=null}break;case"tfhd":{m(this.currentFragment),this.isobmffReader.pos+=1;let n=this.isobmffReader.readU24(),s=!!(n&1),o=!!(n&2),c=!!(n&8),u=!!(n&16),d=!!(n&32),l=!!(n&65536),f=!!(n&131072),g=this.isobmffReader.readU32(),b=this.tracks.find(k=>k.id===g);if(!b)break;let h=this.fragmentTrackDefaults.find(k=>k.trackId===g);this.currentTrack=b,b.currentFragmentState={baseDataOffset:this.currentFragment.implicitBaseDataOffset,sampleDescriptionIndex:h?.defaultSampleDescriptionIndex??null,defaultSampleDuration:h?.defaultSampleDuration??null,defaultSampleSize:h?.defaultSampleSize??null,defaultSampleFlags:h?.defaultSampleFlags??null,startTimestamp:null},s?b.currentFragmentState.baseDataOffset=this.isobmffReader.readU64():f&&(b.currentFragmentState.baseDataOffset=this.currentFragment.moofOffset),o&&(b.currentFragmentState.sampleDescriptionIndex=this.isobmffReader.readU32()),c&&(b.currentFragmentState.defaultSampleDuration=this.isobmffReader.readU32()),u&&(b.currentFragmentState.defaultSampleSize=this.isobmffReader.readU32()),d&&(b.currentFragmentState.defaultSampleFlags=this.isobmffReader.readU32()),l&&(b.currentFragmentState.defaultSampleDuration=0)}break;case"tfdt":{let n=this.currentTrack;if(!n)break;m(n.currentFragmentState);let s=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=s===0?this.isobmffReader.readU32():this.isobmffReader.readU64();n.currentFragmentState.startTimestamp=o}break;case"trun":{let n=this.currentTrack;if(!n)break;if(m(this.currentFragment),m(n.currentFragmentState),this.currentFragment.trackData.has(n.id))throw new Error("Can't have two trun boxes for the same track in one fragment.");let s=this.isobmffReader.readU8(),o=this.isobmffReader.readU24(),c=!!(o&1),u=!!(o&4),d=!!(o&256),l=!!(o&512),f=!!(o&1024),g=!!(o&2048),b=this.isobmffReader.readU32(),h=n.currentFragmentState.baseDataOffset;c&&(h+=this.isobmffReader.readI32());let k=null;u&&(k=this.isobmffReader.readU32());let y=h;if(b===0){this.currentFragment.implicitBaseDataOffset=y;break}let v=0,T={startTimestamp:0,endTimestamp:0,samples:[],presentationTimestamps:[],startTimestampIsFinal:!1};this.currentFragment.trackData.set(n.id,T);for(let N=0;N({presentationTimestamp:N.presentationTimestamp,sampleIndex:M})).sort((N,M)=>N.presentationTimestamp-M.presentationTimestamp);let A=T.samples[T.presentationTimestamps[0].sampleIndex],F=T.samples[R(T.presentationTimestamps).sampleIndex];T.startTimestamp=A.presentationTimestamp,T.endTimestamp=F.presentationTimestamp+F.duration,this.currentFragment.implicitBaseDataOffset=y}break}this.isobmffReader.pos=a}},ht=class{constructor(t){this.internalTrack=t;this.chunkToSampleIndex=new WeakMap;this.chunkToFragmentLocation=new WeakMap}getCodec(){throw new Error("Not implemented on base class.")}async computeDuration(){let e=(await this.getChunk(1/0,{metadataOnly:!0}))?.timestamp;return e?e/1e6:0}async getFirstChunk(t){return this.internalTrack.demuxer.isFragmented?this.performFragmentedLookup(()=>{let e=this.internalTrack.fragments[0];return{fragmentIndex:e?0:-1,sampleIndex:e?0:-1,correctSampleFound:!!e}},0,1/0,t):this.fetchChunkForSampleIndex(0,t)}roundToMicrosecond(t){return(Math.floor(t*1e6)+.99999999)/1e6}async getChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findSampleInFragmentsForTimestamp(r),r,r,e);{let a=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),n=kr(a,r);return this.fetchChunkForSampleIndex(n,e)}}async getNextChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let a=this.chunkToFragmentLocation.get(t);if(a===void 0)throw new Error("Chunk was not created from this track.");let n=a.fragment.trackData.get(this.internalTrack.id),s=n.samples[a.sampleIndex],o=j(this.internalTrack.fragments,a.fragment.moofOffset,c=>c.moofOffset);return m(o!==-1),this.performFragmentedLookup(()=>{if(a.sampleIndex+1l.moofOffset);return m(d!==-1),{fragmentIndex:d,sampleIndex:0,correctSampleFound:!0}}return{fragmentIndex:o,sampleIndex:-1,correctSampleFound:!1}}},s.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");return this.fetchChunkForSampleIndex(r+1,e)}async getKeyChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findKeySampleInFragmentsForTimestamp(r),r,r,e);let a=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),n=kr(a,r),s=n===-1?-1:Ui(a,n);return this.fetchChunkForSampleIndex(s,e)}async getNextKeyChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let s=this.chunkToFragmentLocation.get(t);if(s===void 0)throw new Error("Chunk was not created from this track.");let o=s.fragment.trackData.get(this.internalTrack.id),c=o.samples[s.sampleIndex],u=j(this.internalTrack.fragments,s.fragment.moofOffset,d=>d.moofOffset);return m(u!==-1),this.performFragmentedLookup(()=>{let d=o.samples.findIndex((l,f)=>l.isKeyFrame&&f>s.sampleIndex);if(d!==-1)return{fragmentIndex:u,sampleIndex:d,correctSampleFound:!0};{let l=s.fragment;for(;l.nextFragment;){l=l.nextFragment;let f=l.trackData.get(this.internalTrack.id);if(f){let g=j(this.internalTrack.fragments,l.moofOffset,h=>h.moofOffset);m(g!==-1);let b=f.samples.findIndex(h=>h.isKeyFrame);if(b===-1)throw new Error("Not supported: Fragment does not contain key sample.");return{fragmentIndex:g,sampleIndex:b,correctSampleFound:!0}}}return{fragmentIndex:u,sampleIndex:-1,correctSampleFound:!1}}},c.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");let a=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),n=Bi(a,r);return this.fetchChunkForSampleIndex(n,e)}async fetchChunkForSampleIndex(t,e){if(t===-1)return null;let r=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=zi(r,t);if(!a)return null;let n;e.metadataOnly?n=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(a.chunkOffset,a.chunkOffset+a.chunkSize),n=this.internalTrack.demuxer.chunkReader.readRange(a.sampleOffset,a.sampleOffset+a.sampleSize));let s=1e6*a.presentationTimestamp/this.internalTrack.timescale,o=1e6*a.duration/this.internalTrack.timescale,c=this.createChunk(n,s,o,a.isKeyFrame);return this.chunkToSampleIndex.set(c,t),c}async fetchChunkInFragment(t,e,r){if(e===-1)return null;let n=t.trackData.get(this.internalTrack.id).samples[e];m(n);let s;r.metadataOnly?s=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(t.dataStart,t.dataEnd),s=this.internalTrack.demuxer.chunkReader.readRange(n.byteOffset,n.byteOffset+n.byteSize));let o=1e6*n.presentationTimestamp/this.internalTrack.timescale,c=1e6*n.duration/this.internalTrack.timescale,u=this.createChunk(s,o,c,n.isKeyFrame);return this.chunkToFragmentLocation.set(u,{fragment:t,sampleIndex:e}),u}findSampleInFragmentsForTimestamp(t){let e=_(this.internalTrack.fragments,t,n=>n.trackData.get(this.internalTrack.id).startTimestamp),r=-1,a=!1;if(e!==-1){let s=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=_(s.presentationTimestamps,t,c=>c.presentationTimestamp);m(o!==-1),r=s.presentationTimestamps[o].sampleIndex,a=tn.trackData.get(this.internalTrack.id).startTimestamp),r=-1,a=!1;if(e!==-1){let s=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=Lt(s.presentationTimestamps,u=>s.samples[u.sampleIndex].isKeyFrame&&u.presentationTimestamp<=t);if(o===-1)throw new Error("Not supported: Fragment does not begin with a key sample.");r=s.presentationTimestamps[o].sampleIndex,a=ty.timestamp);k!==-1&&(h=this.internalTrack.fragmentLookupTable[k])}if(o===-1)d.pos=h?.moofOffset??0;else{let k=this.internalTrack.fragments[o];!h||k.moofOffset>=k.moofOffset?(d.pos=k.moofOffset+k.moofSize,f=k):d.pos=h.moofOffset}for(;d.posr)break;if(f.nextFragment){d.pos=f.nextFragment.moofOffset+f.nextFragment.moofSize,f=f.nextFragment;continue}}await d.reader.loadRange(d.pos,d.pos+16);let k=d.pos,y=d.readBoxHeader();if(y.name==="moof"){let v=j(n.fragments,k,T=>T.moofOffset);if(v===-1){d.pos=k;let T=await n.readFragment();f&&(f.nextFragment=T),f=T;let{fragmentIndex:A,sampleIndex:F,correctSampleFound:N}=t();if(N){let M=this.internalTrack.fragments[A];return this.fetchChunkInFragment(M,F,a)}A!==-1&&(g=A,b=F)}else{let T=n.fragments[v];f&&(f.nextFragment=T),f=T}}d.pos=k+y.totalSize}if(g!==-1){let k=this.internalTrack.fragments[g];return this.fetchChunkInFragment(k,b,a)}return null}finally{s()}}},Vt=class extends ht{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getCodedWidth(){return this.internalTrack.info.width}async getCodedHeight(){return this.internalTrack.info.height}async getRotation(){return this.internalTrack.rotation}async getDecoderConfig(){return{codec:cr(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),codedWidth:this.internalTrack.info.width,codedHeight:this.internalTrack.info.height,description:this.internalTrack.info.codecDescription??void 0,colorSpace:this.internalTrack.info.colorSpace??void 0}}createChunk(t,e,r,a){return new EncodedVideoChunk({data:t,timestamp:e,duration:r,type:a?"key":"delta"})}},Mt=class extends ht{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getNumberOfChannels(){return this.internalTrack.info.numberOfChannels}async getSampleRate(){return this.internalTrack.info.sampleRate}async getDecoderConfig(){return{codec:dr(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),numberOfChannels:this.internalTrack.info.numberOfChannels,sampleRate:this.internalTrack.info.sampleRate,description:this.internalTrack.info.codecDescription??void 0}}createChunk(t,e,r,a){return new EncodedAudioChunk({data:t,timestamp:e,duration:r,type:a?"key":"delta"})}},kr=(i,t)=>{let e=_(i.presentationTimestamps,t,r=>r.presentationTimestamp);return e===-1?-1:i.presentationTimestamps[e].sampleIndex},zi=(i,t)=>{let e=_(i.sampleTimingEntries,t,h=>h.startIndex),r=i.sampleTimingEntries[e];if(!r||r.startIndex+r.count<=t)return null;let n=r.startDecodeTimestamp+(t-r.startIndex)*r.delta,s=_(i.sampleCompositionTimeOffsets,t,h=>h.startIndex),o=i.sampleCompositionTimeOffsets[s];o&&(n+=o.offset);let c=i.sampleSizes[Math.min(t,i.sampleSizes.length-1)],u=_(i.sampleToChunk,t,h=>h.startSampleIndex),d=i.sampleToChunk[u];m(d);let 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this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getSubtitleTrackData(e,r){let a=this.trackDatas.find(n=>n.track===e);if(a)return a;Be(r),d(r),d(r.config);let s={track:e,type:"subtitle",info:{config:r.config},timescale:1e3,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[],lastCueEndTimestamp:0,cueQueue:[],nextSourceId:0,cueToSourceId:new WeakMap};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),this.validateAndNormalizeTimestamp(e,0,!0),s}async addEncodedVideoChunk(e,r,a){let s=await this.mutex.acquire();try{let n=this.getVideoTrackData(e,a),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=this.validateAndNormalizeTimestamp(n.track,r.timestamp,r.type==="key"),u=this.createSampleForTrack(n,o,c,(r.duration??0)/1e6,r.type);await this.registerSample(n,u)}finally{s()}}async addEncodedAudioChunk(e,r,a){let s=await this.mutex.acquire();try{let n=this.getAudioTrackData(e,a),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type,u=this.validateAndNormalizeTimestamp(n.track,r.timestamp,c==="key"),m=this.createSampleForTrack(n,o,u,(r.duration??0)/1e6,c);await this.registerSample(n,m)}finally{s()}}async addSubtitleCue(e,r,a){let s=await this.mutex.acquire();try{let n=this.getSubtitleTrackData(e,a);this.validateAndNormalizeTimestamp(n.track,1e6*r.timestamp,!0),e.source._codec==="webvtt"&&(n.cueQueue.push(r),await this.processWebVTTCues(n,r.timestamp))}finally{s()}}async processWebVTTCues(e,r){for(;e.cueQueue.length>0;){let a=new Set([]);for(let m of e.cueQueue)d(m.timestamp<=r),d(e.lastCueEndTimestamp<=m.timestamp+m.duration),a.add(Math.max(m.timestamp,e.lastCueEndTimestamp)),a.add(m.timestamp+m.duration);let s=[...a].sort((m,l)=>m-l),n=s[0],o=s[1]??n;if(r=o)break;ee.lastIndex=0;let f=ee.test(l.text),g=l.timestamp+l.duration,b=e.cueToSourceId.get(l);if(b===void 0&&oa.timestamp).sort((a,s)=>a-s);for(let a=0;a{if(e===o)return r.type==="key";let c=o.sampleQueue[0];return c&&c.type==="key"});s>=1&&n&&(a=!0,await this.finalizeFragment())}else a=s>=.5}a&&(e.currentChunk&&await this.finalizeCurrentChunk(e),e.currentChunk={startTimestamp:r.timestamp,samples:[],offset:null,moofOffset:null}),d(e.currentChunk),e.currentChunk.samples.push(r),e.timestampProcessingQueue.push(r)}async finalizeCurrentChunk(e){if(d(this.fastStart!=="fragmented"),!!e.currentChunk){if(e.finalizedChunks.push(e.currentChunk),this.finalizedChunks.push(e.currentChunk),(e.compactlyCodedChunkTable.length===0||R(e.compactlyCodedChunkTable).samplesPerChunk!==e.currentChunk.samples.length)&&e.compactlyCodedChunkTable.push({firstChunk:e.finalizedChunks.length,samplesPerChunk:e.currentChunk.samples.length}),this.fastStart==="in-memory"){e.currentChunk.offset=0;return}e.currentChunk.offset=this.writer.getPos();for(let r of e.currentChunk.samples)d(r.data),this.writer.write(r.data),r.data=null;await this.writer.flush()}}async interleaveSamples(){d(this.fastStart==="fragmented");for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(r=>r.track===e))return;e:for(;;){let e=null,r=1/0;for(let s of this.trackDatas){if(s.sampleQueue.length===0&&!s.track.source._closed)break e;s.sampleQueue.length>0&&s.sampleQueue[0].timestampu.currentChunk),s=this.writer.getPos(),n=ot(r,a);this.boxWriter.writeBox(n);{let u=Me(!1),m=0;for(let f of a)for(let g of f.currentChunk.samples)m+=g.size;let l=this.boxWriter.measureBox(u)+m;l>=2**32&&(u.largeSize=!0,l=this.boxWriter.measureBox(u)+m),u.size=l,this.boxWriter.writeBox(u)}for(let u of a){u.currentChunk.offset=this.writer.getPos(),u.currentChunk.moofOffset=s;for(let m of u.currentChunk.samples)this.writer.write(m.data),m.data=null}let o=this.writer.getPos();this.writer.seek(this.boxWriter.offsets.get(n));let c=ot(r,a);this.boxWriter.writeBox(c),this.writer.seek(o);for(let u of a)u.finalizedChunks.push(u.currentChunk),this.finalizedChunks.push(u.currentChunk),u.currentChunk=null;e&&await this.writer.flush()}async onTrackClose(e){let r=await this.mutex.acquire();if(e.type==="subtitle"&&e.source._codec==="webvtt"){let a=this.trackDatas.find(s=>s.track===e);a&&await this.processWebVTTCues(a,1/0)}this.fastStart==="fragmented"&&await this.interleaveSamples(),r()}async finalize(){let e=await this.mutex.acquire();for(let r of this.trackDatas)r.type==="subtitle"&&r.track.source._codec==="webvtt"&&await this.processWebVTTCues(r,1/0);if(this.fastStart==="fragmented"){for(let r of this.trackDatas){for(let a of r.sampleQueue)await this.addSampleToTrack(r,a);this.processTimestamps(r)}await this.finalizeFragment(!1)}else for(let r of this.trackDatas)this.processTimestamps(r),await this.finalizeCurrentChunk(r);if(this.fastStart==="in-memory"){d(this.mdat);let r;for(let s=0;s<2;s++){let n=pe(this.trackDatas,this.creationTime),o=this.boxWriter.measureBox(n);r=this.boxWriter.measureBox(this.mdat);let c=this.writer.getPos()+o+r;for(let u of this.finalizedChunks){u.offset=c;for(let{data:m}of u.samples)d(m),c+=m.byteLength,r+=m.byteLength}if(c<2**32)break;r>=2**32&&(this.mdat.largeSize=!0)}let a=pe(this.trackDatas,this.creationTime);this.boxWriter.writeBox(a),this.mdat.size=r,this.boxWriter.writeBox(this.mdat);for(let s of this.finalizedChunks)for(let n of s.samples)d(n.data),this.writer.write(n.data),n.data=null}else if(this.fastStart==="fragmented"){let r=this.writer.getPos(),a=qt(this.trackDatas);this.boxWriter.writeBox(a);let s=this.writer.getPos()-r;this.writer.seek(this.writer.getPos()-4),this.boxWriter.writeU32(s)}else{d(this.mdat),d(this.ftypSize!==null);let r=this.boxWriter.offsets.get(this.mdat);d(r!==void 0);let a=this.writer.getPos()-r;this.mdat.size=a,this.mdat.largeSize=a>=2**32,this.boxWriter.patchBox(this.mdat);let s=pe(this.trackDatas,this.creationTime);if(typeof this.fastStart=="object"){this.writer.seek(this.ftypSize),this.boxWriter.writeBox(s);let n=r-this.writer.getPos();this.boxWriter.writeBox($t(n))}else this.boxWriter.writeBox(s)}e()}};var ke=class{constructor(t){this.value=t}},ae=class{constructor(t){this.value=t}},ge=class{constructor(t){this.value=t}};var mt=i=>i<256?1:i<65536?2:i<1<<24?3:i<2**32?4:i<2**40?5:6,dt=i=>i>=-64&&i<64?1:i>=-8192&&i<8192?2:i>=-(1<<20)&&i<1<<20?3:i>=-(1<<27)&&i<1<<27?4:i>=-(2**34)&&i<2**34?5:6,cr=i=>{if(i<127)return 1;if(i<16383)return 2;if(i<(1<<21)-1)return 3;if(i<(1<<28)-1)return 4;if(i<2**35-1)return 5;if(i<2**42-1)return 6;throw new Error("EBML VINT size not supported "+i)};var lt=2**15,ur="https://github.com/Vanilagy/webm-muxer",mr=6,dr=5,ki={avc:"V_MPEG4/ISO/AVC",hevc:"V_MPEGH/ISO/HEVC",vp8:"V_VP8",vp9:"V_VP9",av1:"V_AV1",aac:"A_AAC",opus:"A_OPUS",webvtt:"S_TEXT/WEBVTT"},gi={video:1,audio:2,subtitle:17},Ne=class extends te{constructor(e,r){super(e);this.timestampsMustStartAtZero=!1;this.helper=new Uint8Array(8);this.helperView=new DataView(this.helper.buffer);this.offsets=new WeakMap;this.dataOffsets=new WeakMap;this.trackDatas=[];this.segment=null;this.segmentInfo=null;this.seekHead=null;this.tracksElement=null;this.segmentDuration=null;this.cues=null;this.currentCluster=null;this.currentClusterMsTimestamp=null;this.trackDatasInCurrentCluster=new Set;this.duration=0;this.writer=e._writer,this.format=r,this.format._options.streamable&&(this.writer.ensureMonotonicity=!0)}writeByte(e){this.helperView.setUint8(0,e),this.writer.write(this.helper.subarray(0,1))}writeFloat32(e){this.helperView.setFloat32(0,e,!1),this.writer.write(this.helper.subarray(0,4))}writeFloat64(e){this.helperView.setFloat64(0,e,!1),this.writer.write(this.helper)}writeUnsignedInt(e,r=mt(e)){let a=0;switch(r){case 6:this.helperView.setUint8(a++,e/2**40|0);case 5:this.helperView.setUint8(a++,e/2**32|0);case 4:this.helperView.setUint8(a++,e>>24);case 3:this.helperView.setUint8(a++,e>>16);case 2:this.helperView.setUint8(a++,e>>8);case 1:this.helperView.setUint8(a++,e);break;default:throw new Error("Bad UINT size "+r)}this.writer.write(this.helper.subarray(0,a))}writeSignedInt(e,r=dt(e)){e<0&&(e+=2**(r*8)),this.writeUnsignedInt(e,r)}writeEBMLVarInt(e,r=cr(e)){let a=0;switch(r){case 1:this.helperView.setUint8(a++,128|e);break;case 2:this.helperView.setUint8(a++,64|e>>8),this.helperView.setUint8(a++,e);break;case 3:this.helperView.setUint8(a++,32|e>>16),this.helperView.setUint8(a++,e>>8),this.helperView.setUint8(a++,e);break;case 4:this.helperView.setUint8(a++,16|e>>24),this.helperView.setUint8(a++,e>>16),this.helperView.setUint8(a++,e>>8),this.helperView.setUint8(a++,e);break;case 5:this.helperView.setUint8(a++,8|e/2**32&7),this.helperView.setUint8(a++,e>>24),this.helperView.setUint8(a++,e>>16),this.helperView.setUint8(a++,e>>8),this.helperView.setUint8(a++,e);break;case 6:this.helperView.setUint8(a++,4|e/2**40&3),this.helperView.setUint8(a++,e/2**32|0),this.helperView.setUint8(a++,e>>24),this.helperView.setUint8(a++,e>>16),this.helperView.setUint8(a++,e>>8),this.helperView.setUint8(a++,e);break;default:throw new Error("Bad EBML VINT size "+r)}this.writer.write(this.helper.subarray(0,a))}writeString(e){this.writer.write(new Uint8Array(e.split("").map(r=>r.charCodeAt(0))))}writeEBML(e){if(e!==null){if(e instanceof Uint8Array)this.writer.write(e);else if(Array.isArray(e))for(let r of e)this.writeEBML(r);else if(this.offsets.set(e,this.writer.getPos()),this.writeUnsignedInt(e.id),Array.isArray(e.data)){let r=this.writer.getPos(),a=e.size===-1?1:e.size??4;e.size===-1?this.writeByte(255):this.writer.seek(this.writer.getPos()+a);let s=this.writer.getPos();if(this.dataOffsets.set(e,s),this.writeEBML(e.data),e.size!==-1){let n=this.writer.getPos()-s,o=this.writer.getPos();this.writer.seek(r),this.writeEBMLVarInt(n,a),this.writer.seek(o)}}else if(typeof e.data=="number"){let r=e.size??mt(e.data);this.writeEBMLVarInt(r),this.writeUnsignedInt(e.data,r)}else if(typeof e.data=="string")this.writeEBMLVarInt(e.data.length),this.writeString(e.data);else if(e.data instanceof Uint8Array)this.writeEBMLVarInt(e.data.byteLength,e.size),this.writer.write(e.data);else if(e.data instanceof ke)this.writeEBMLVarInt(4),this.writeFloat32(e.data.value);else if(e.data instanceof ae)this.writeEBMLVarInt(8),this.writeFloat64(e.data.value);else if(e.data instanceof ge){let r=e.size??dt(e.data.value);this.writeEBMLVarInt(r),this.writeSignedInt(e.data.value,r)}}}beforeTrackAdd(e){if(this.format instanceof ne)if(e.type==="video"){if(!["vp8","vp9","av1"].includes(e.source._codec))throw new Error("WebM only supports VP8, VP9 and AV1 as video codecs. Switching to MKV removes this restriction.")}else if(e.type==="audio"){if(!["opus","vorbis"].includes(e.source._codec))throw new Error("WebM only supports Opus and Vorbis as audio codecs. Switching to MKV removes this restriction.")}else if(e.type==="subtitle"){if(e.source._codec!=="webvtt")throw new Error("WebM only supports WebVTT as subtitle codec. Switching to MKV removes this restriction.")}else throw new Error("WebM only supports video, audio and subtitle tracks. Switching to MKV removes this restriction.")}async start(){let e=await this.mutex.acquire();this.writeEBMLHeader(),this.format._options.streamable||this.createSeekHead(),this.createSegmentInfo(),this.createCues(),await this.writer.flush(),e()}writeEBMLHeader(){let e={id:440786851,data:[{id:17030,data:1},{id:17143,data:1},{id:17138,data:4},{id:17139,data:8},{id:17026,data:this.format instanceof ne?"webm":"matroska"},{id:17031,data:2},{id:17029,data:2}]};this.writeEBML(e)}createSeekHead(){let e=new Uint8Array([28,83,187,107]),r=new Uint8Array([21,73,169,102]),a=new Uint8Array([22,84,174,107]),s={id:290298740,data:[{id:19899,data:[{id:21419,data:e},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:r},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:a},{id:21420,size:5,data:0}]}]};this.seekHead=s}createSegmentInfo(){let e={id:17545,data:new ae(0)};this.segmentDuration=e;let r={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:ur},{id:22337,data:ur},this.format._options.streamable?null:e]};this.segmentInfo=r}createTracks(){let e={id:374648427,data:[]};this.tracksElement=e;for(let r of this.trackDatas)e.data.push({id:174,data:[{id:215,data:r.track.id},{id:29637,data:r.track.id},{id:131,data:gi[r.type]},{id:134,data:ki[r.track.source._codec]},r.type==="video"?this.videoSpecificTrackInfo(r):null,r.type==="audio"?this.audioSpecificTrackInfo(r):null,r.type==="subtitle"?this.subtitleSpecificTrackInfo(r):null]})}videoSpecificTrackInfo(e){let r=[e.info.decoderConfig.description?{id:25506,data:$(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],a=e.info.decoderConfig.colorSpace,s={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},Ae(a)?{id:21936,data:[{id:21937,data:X[a.matrix]},{id:21946,data:q[a.transfer]},{id:21947,data:j[a.primaries]},{id:21945,data:a.fullRange?2:1}]}:null]};return r.push(s),r}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:$(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new ke(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:D.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:mr,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return d(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,r){let a=this.trackDatas.find(n=>n.track===e);if(a)return a;ze(r),d(r),d(r.decoderConfig),d(r.decoderConfig.codedWidth!==void 0),d(r.decoderConfig.codedHeight!==void 0);let s={track:e,type:"video",info:{width:r.decoderConfig.codedWidth,height:r.decoderConfig.codedHeight,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getAudioTrackData(e,r){let a=this.trackDatas.find(n=>n.track===e);if(a)return a;Ue(r),d(r),d(r.decoderConfig);let s={track:e,type:"audio",info:{numberOfChannels:r.decoderConfig.numberOfChannels,sampleRate:r.decoderConfig.sampleRate,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}getSubtitleTrackData(e,r){let a=this.trackDatas.find(n=>n.track===e);if(a)return a;Be(r),d(r),d(r.config);let s={track:e,type:"subtitle",info:{config:r.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(s),this.trackDatas.sort((n,o)=>n.track.id-o.track.id),s}async addEncodedVideoChunk(e,r,a){let s=await this.mutex.acquire();try{let n=this.getVideoTrackData(e,a),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type==="key",u=this.validateAndNormalizeTimestamp(n.track,r.timestamp,c),m=this.createInternalChunk(o,u,(r.duration??0)/1e6,r.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(n,m),n.chunkQueue.push(m),await this.interleaveChunks()}finally{s()}}async addEncodedAudioChunk(e,r,a){let s=await this.mutex.acquire();try{let n=this.getAudioTrackData(e,a),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type,u=c==="key",m=this.validateAndNormalizeTimestamp(n.track,r.timestamp,u),l=this.createInternalChunk(o,m,(r.duration??0)/1e6,c);n.chunkQueue.push(l),await this.interleaveChunks()}finally{s()}}async addSubtitleCue(e,r,a){let s=await this.mutex.acquire();try{let n=this.getSubtitleTrackData(e,a),o=this.validateAndNormalizeTimestamp(n.track,1e6*r.timestamp,!0),c=r.text,u=Math.floor(o*1e3);ee.lastIndex=0,c=c.replace(ee,g=>{let p=Oe(g.slice(1,-1))-u;return`<${Ee(p)}>`});let m=D.encode(c),l=`${r.settings??""} +`,a);c===-1&&(c=t.length);let u=Fe(e[2]),l=Fe(e[3])-u,f=t.slice(s,c).trim();t=t.slice(c).trimStart(),be.lastIndex=0;let 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0);let a={track:e,type:"video",info:{width:r.decoderConfig.codedWidth,height:r.decoderConfig.codedHeight,decoderConfig:r.decoderConfig},timescale:e.metadata.frameRate??57600,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return this.trackDatas.push(a),this.trackDatas.sort((s,o)=>s.track.id-o.track.id),a}getAudioTrackData(e,r){let n=this.trackDatas.find(s=>s.track===e);if(n)return n;Ne(r),m(r),m(r.decoderConfig);let a={track:e,type:"audio",info:{numberOfChannels:r.decoderConfig.numberOfChannels,sampleRate:r.decoderConfig.sampleRate,decoderConfig:r.decoderConfig},timescale:r.decoderConfig.sampleRate,samples:[],sampleQueue:[],timestampProcessingQueue:[],timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return 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addEncodedAudioChunk(e,r,n){let a=await this.mutex.acquire();try{let s=this.getAudioTrackData(e,n),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type,u=this.validateAndNormalizeTimestamp(s.track,r.timestamp,c==="key"),d=this.createSampleForTrack(s,o,u,(r.duration??0)/1e6,c);await this.registerSample(s,d)}finally{a()}}async addSubtitleCue(e,r,n){let a=await this.mutex.acquire();try{let s=this.getSubtitleTrackData(e,n);this.validateAndNormalizeTimestamp(s.track,1e6*r.timestamp,!0),e.source._codec==="webvtt"&&(s.cueQueue.push(r),await this.processWebVTTCues(s,r.timestamp))}finally{a()}}async processWebVTTCues(e,r){for(;e.cueQueue.length>0;){let n=new Set([]);for(let d of e.cueQueue)m(d.timestamp<=r),m(e.lastCueEndTimestamp<=d.timestamp+d.duration),n.add(Math.max(d.timestamp,e.lastCueEndTimestamp)),n.add(d.timestamp+d.duration);let a=[...n].sort((d,l)=>d-l),s=a[0],o=a[1]??s;if(r=o)break;se.lastIndex=0;let f=se.test(l.text),g=l.timestamp+l.duration,b=e.cueToSourceId.get(l);if(b===void 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a=ge(this.trackDatas,this.creationTime);if(typeof this.fastStart=="object"){this.writer.seek(this.ftypSize),this.boxWriter.writeBox(a);let s=r-this.writer.getPos();this.boxWriter.writeBox(Xt(s))}else this.boxWriter.writeBox(a)}e()}};var Ce=class{constructor(t){this.value=t}},me=class{constructor(t){this.value=t}},we=class{constructor(t){this.value=t}};var lt=i=>i<256?1:i<65536?2:i<1<<24?3:i<2**32?4:i<2**40?5:6,ft=i=>i>=-64&&i<64?1:i>=-8192&&i<8192?2:i>=-(1<<20)&&i<1<<20?3:i>=-(1<<27)&&i<1<<27?4:i>=-(2**34)&&i<2**34?5:6,mr=i=>{if(i<127)return 1;if(i<16383)return 2;if(i<(1<<21)-1)return 3;if(i<(1<<28)-1)return 4;if(i<2**35-1)return 5;if(i<2**42-1)return 6;throw new Error("EBML VINT size not supported "+i)};var ht=2**15,lr="https://github.com/Vanilagy/webm-muxer",fr=6,hr=5,xi={avc:"V_MPEG4/ISO/AVC",hevc:"V_MPEGH/ISO/HEVC",vp8:"V_VP8",vp9:"V_VP9",av1:"V_AV1",aac:"A_AAC",opus:"A_OPUS",webvtt:"S_TEXT/WEBVTT"},Ci={video:1,audio:2,subtitle:17},Le=class extends oe{constructor(e,r){super(e);this.timestampsMustStartAtZero=!1;this.helper=new Uint8Array(8);this.helperView=new DataView(this.helper.buffer);this.offsets=new WeakMap;this.dataOffsets=new WeakMap;this.trackDatas=[];this.segment=null;this.segmentInfo=null;this.seekHead=null;this.tracksElement=null;this.segmentDuration=null;this.cues=null;this.currentCluster=null;this.currentClusterMsTimestamp=null;this.trackDatasInCurrentCluster=new Set;this.duration=0;this.writer=e._writer,this.format=r,this.format._options.streamable&&(this.writer.ensureMonotonicity=!0)}writeByte(e){this.helperView.setUint8(0,e),this.writer.write(this.helper.subarray(0,1))}writeFloat32(e){this.helperView.setFloat32(0,e,!1),this.writer.write(this.helper.subarray(0,4))}writeFloat64(e){this.helperView.setFloat64(0,e,!1),this.writer.write(this.helper)}writeUnsignedInt(e,r=lt(e)){let n=0;switch(r){case 6:this.helperView.setUint8(n++,e/2**40|0);case 5:this.helperView.setUint8(n++,e/2**32|0);case 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Switching to MKV removes this restriction.")}else if(e.type==="audio"){if(!["opus","vorbis"].includes(e.source._codec))throw new Error("WebM only supports Opus and Vorbis as audio codecs. Switching to MKV removes this restriction.")}else if(e.type==="subtitle"){if(e.source._codec!=="webvtt")throw new Error("WebM only supports WebVTT as subtitle codec. Switching to MKV removes this restriction.")}else throw new Error("WebM only supports video, audio and subtitle tracks. 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r={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:lr},{id:22337,data:lr},this.format._options.streamable?null:e]};this.segmentInfo=r}createTracks(){let e={id:374648427,data:[]};this.tracksElement=e;for(let r of this.trackDatas)e.data.push({id:174,data:[{id:215,data:r.track.id},{id:29637,data:r.track.id},{id:131,data:Ci[r.type]},{id:134,data:xi[r.track.source._codec]},r.type==="video"?this.videoSpecificTrackInfo(r):null,r.type==="audio"?this.audioSpecificTrackInfo(r):null,r.type==="subtitle"?this.subtitleSpecificTrackInfo(r):null]})}videoSpecificTrackInfo(e){let r=[e.info.decoderConfig.description?{id:25506,data:G(e.info.decoderConfig.description)}:null,e.track.metadata.frameRate?{id:2352003,data:1e9/e.track.metadata.frameRate}:null],n=e.info.decoderConfig.colorSpace,a={id:224,data:[{id:176,data:e.info.width},{id:186,data:e.info.height},Oe(n)?{id:21936,data:[{id:21937,data:J[n.matrix]},{id:21946,data:Z[n.transfer]},{id:21947,data:Y[n.primaries]},{id:21945,data:n.fullRange?2:1}]}:null]};return r.push(a),r}audioSpecificTrackInfo(e){return[e.info.decoderConfig.description?{id:25506,data:G(e.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new Ce(e.info.sampleRate)},{id:159,data:e.info.numberOfChannels}]}]}subtitleSpecificTrackInfo(e){return[{id:25506,data:D.encode(e.info.config.description)}]}createSegment(){let e={id:408125543,size:this.format._options.streamable?-1:fr,data:[this.format._options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return m(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,r){let n=this.trackDatas.find(s=>s.track===e);if(n)return n;Be(r),m(r),m(r.decoderConfig),m(r.decoderConfig.codedWidth!==void 0),m(r.decoderConfig.codedHeight!==void 0);let a={track:e,type:"video",info:{width:r.decoderConfig.codedWidth,height:r.decoderConfig.codedHeight,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(a),this.trackDatas.sort((s,o)=>s.track.id-o.track.id),a}getAudioTrackData(e,r){let n=this.trackDatas.find(s=>s.track===e);if(n)return n;Ne(r),m(r),m(r.decoderConfig);let a={track:e,type:"audio",info:{numberOfChannels:r.decoderConfig.numberOfChannels,sampleRate:r.decoderConfig.sampleRate,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(a),this.trackDatas.sort((s,o)=>s.track.id-o.track.id),a}getSubtitleTrackData(e,r){let n=this.trackDatas.find(s=>s.track===e);if(n)return n;We(r),m(r),m(r.config);let a={track:e,type:"subtitle",info:{config:r.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(a),this.trackDatas.sort((s,o)=>s.track.id-o.track.id),a}async addEncodedVideoChunk(e,r,n){let a=await this.mutex.acquire();try{let s=this.getVideoTrackData(e,n),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type==="key",u=this.validateAndNormalizeTimestamp(s.track,r.timestamp,c),d=this.createInternalChunk(o,u,(r.duration??0)/1e6,r.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(s,d),s.chunkQueue.push(d),await this.interleaveChunks()}finally{a()}}async addEncodedAudioChunk(e,r,n){let a=await this.mutex.acquire();try{let s=this.getAudioTrackData(e,n),o=new Uint8Array(r.byteLength);r.copyTo(o);let c=r.type,u=c==="key",d=this.validateAndNormalizeTimestamp(s.track,r.timestamp,u),l=this.createInternalChunk(o,d,(r.duration??0)/1e6,c);s.chunkQueue.push(l),await this.interleaveChunks()}finally{a()}}async addSubtitleCue(e,r,n){let a=await this.mutex.acquire();try{let s=this.getSubtitleTrackData(e,n),o=this.validateAndNormalizeTimestamp(s.track,1e6*r.timestamp,!0),c=r.text,u=Math.floor(o*1e3);se.lastIndex=0,c=c.replace(se,g=>{let h=Fe(g.slice(1,-1))-u;return`<${Ve(h)}>`});let d=D.encode(c),l=`${r.settings??""} ${r.identifier??""} -${r.notes??""}`,f=this.createInternalChunk(m,o,r.duration,"key",l.trim()?D.encode(l):null);n.chunkQueue.push(f),await this.interleaveChunks()}finally{s()}}async interleaveChunks(){for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(r=>r.track===e))return;e:for(;;){let e=null,r=1/0;for(let s of this.trackDatas){if(s.chunkQueue.length===0&&!s.track.source._closed)break e;s.chunkQueue.length>0&&s.chunkQueue[0].timestamp=2&&a++;let u={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];Ft(r.data,a+0,a+3,u)}createInternalChunk(e,r,a,s,n=null){return{data:e,type:s,timestamp:r,duration:a,additions:n}}writeBlock(e,r){this.segment||(this.createTracks(),this.createSegment());let a=Math.floor(1e3*r.timestamp),s=this.trackDatas.every(l=>{if(l.track.source._closed)return!0;if(e===l)return r.type==="key";let f=l.chunkQueue[0];return f&&f.type==="key"});(!this.currentCluster||s&&a-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(a);let n=a-this.currentClusterMsTimestamp;if(n<0)return;if(n>=lt)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${lt} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${lt} milliseconds.`);let c=new Uint8Array(4),u=new DataView(c.buffer);u.setUint8(0,128|e.track.id),u.setInt16(1,n,!1);let m=Math.floor(1e3*r.duration);if(m===0&&!r.additions){u.setUint8(3,+(r.type==="key")<<7);let l={id:163,data:[c,r.data]};this.writeEBML(l)}else{let l={id:160,data:[{id:161,data:[c,r.data]},r.type==="delta"?{id:251,data:new ge(e.lastWrittenMsTimestamp-a)}:null,r.additions?{id:30113,data:[{id:166,data:[{id:165,data:r.additions},{id:238,data:1}]}]}:null,m>0?{id:155,data:m}:null]};this.writeEBML(l)}this.duration=Math.max(this.duration,a+m),e.lastWrittenMsTimestamp=a,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:dr,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){d(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),r=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,dr),this.writer.seek(r);let a=this.offsets.get(this.currentCluster)-this.segmentDataOffset;d(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(s=>({id:183,data:[{id:247,data:s.track.id},{id:241,data:a}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let r of this.trackDatas)for(;r.chunkQueue.length>0;)this.writeBlock(r,r.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),d(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let r=this.writer.getPos(),a=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(a,mr),this.segmentDuration.data=new ae(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(r)}e()}};var Z=class{},ft=class extends Z{constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(t.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=t}_createMuxer(t){return new We(t,this)}},He=class extends Z{constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.streamable!==void 0&&typeof t.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=t}_createMuxer(t){return new Ne(t,this)}},ne=class extends He{};var oe=class{constructor(){this._connectedTrack=null;this._closed=!1;this._offsetTimestamps=!1}_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},N=class extends oe{constructor(e){super();this._connectedTrack=null;if(!ie.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${ie.join(", ")}.`);this._codec=e}},pt=class extends N{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,t,e)}},Ti=5,xi=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!ie.includes(i.codec))throw new TypeError(`Invalid video codec '${i.codec}'. Must be one of: ${ie.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(i.latencyMode!==void 0&&!["quality","realtime"].includes(i.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},Te=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastMultipleOfKeyFrameInterval=-1;this.lastWidth=null;this.lastHeight=null;xi(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(t.codedWidth!==this.lastWidth||t.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${t.codedWidth}x${t.codedHeight}.`)}else this.lastWidth=t.codedWidth,this.lastHeight=t.codedHeight;this.ensureEncoder(t),d(this.encoder);let e=Math.floor(t.timestamp/1e6/Ti);this.encoder.encode(t,{keyFrame:e!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=e,this.encoder.encodeQueueSize>=4&&await new Promise(r=>this.encoder.addEventListener("dequeue",r,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new VideoEncoder({output:(e,r)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,e,r),error:e=>console.error("Video encode error:",e)}),this.encoder.configure({codec:rr(this.codecConfig.codec,t.codedWidth,t.codedHeight,this.codecConfig.bitrate),width:t.codedWidth,height:t.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...nr(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},ht=class extends N{constructor(t){super(t.codec),this._encoder=new Te(this,t)}digest(t){if(!(t instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},bt=class extends N{constructor(t,e){if(!(t instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(e.codec),this._encoder=new Te(this,e),this._canvas=t}digest(t,e=0){if(!Number.isFinite(t)||t<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(e)||e<0)throw new TypeError("duration must be a non-negative number.");let r=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*t),duration:Math.round(1e6*e),alpha:"discard"}),a=this._encoder.digest(r);return r.close(),a}_flush(){return this._encoder.flush()}},kt=class extends N{constructor(e,r){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");r={...r,latencyMode:"realtime"};super(r.codec);this._abortController=null;this._offsetTimestamps=!0;this._encoder=new Te(this,r),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),r=new WritableStream({write:a=>{this._encoder.digest(a),a.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(a=>{a instanceof DOMException&&a.name==="AbortError"||console.error("Pipe error:",a)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},H=class extends oe{constructor(e){super();this._connectedTrack=null;if(!se.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${se.join(", ")}.`);this._codec=e}},gt=class extends H{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,t,e)}},Ci=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!se.includes(i.codec))throw new TypeError(`Invalid audio codec '${i.codec}'. Must be one of: ${se.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},xe=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastNumberOfChannels=null;this.lastSampleRate=null;Ci(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(t.numberOfChannels!==this.lastNumberOfChannels||t.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${t.numberOfChannels} channels at ${t.sampleRate} Hz.`)}else this.lastNumberOfChannels=t.numberOfChannels,this.lastSampleRate=t.sampleRate;this.ensureEncoder(t),d(this.encoder),this.encoder.encode(t),this.encoder.encodeQueueSize>=4&&await new Promise(e=>this.encoder.addEventListener("dequeue",e,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new AudioEncoder({output:(e,r)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,e,r),error:e=>console.error("Audio encode error:",e)}),this.encoder.configure({codec:sr(this.codecConfig.codec,t.numberOfChannels,t.sampleRate),numberOfChannels:t.numberOfChannels,sampleRate:t.sampleRate,bitrate:this.codecConfig.bitrate,...or(this.codecConfig.codec)}),d(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},Tt=class extends H{constructor(t){super(t.codec),this._encoder=new xe(this,t)}digest(t){if(!(t instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},xt=class extends H{constructor(e){super(e.codec);this._accumulatedFrameCount=0;this._encoder=new xe(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let r=e.numberOfChannels,a=e.sampleRate,s=e.length,n=new Float32Array(r*s);for(let u=0;u{this._encoder.digest(a),a.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(a=>{a instanceof DOMException&&a.name==="AbortError"||console.error("Pipe error:",a)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},ce=class extends oe{constructor(e){super();this._connectedTrack=null;if(!Pe.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${Pe.join(", ")}.`);this._codec=e}},St=class extends ce{constructor(t){super(t),this._parser=new Re({codec:t,output:(e,r)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,e,r),error:e=>console.error("Subtitle parse error:",e)})}digest(t){if(typeof t!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(t),this._connectedTrack.output._muxer.mutex.currentPromise}};var wt=class{constructor(t){this._tracks=[];this._started=!1;this._finalizing=!1;this._mutex=new L;if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(!(t.format instanceof Z))throw new TypeError("options.format must be an OutputFormat.");if(!(t.target instanceof Y))throw new TypeError("options.target must be a Target.");if(t.target._output)throw new Error("Target is already used for another output.");t.target._output=this,this._writer=t.target._createWriter(),this._muxer=t.format._createMuxer(this)}addVideoTrack(t,e={}){if(!(t instanceof N))throw new TypeError("source must be a VideoSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");if(typeof e.rotation=="number"&&![0,90,180,270].includes(e.rotation))throw new TypeError(`Invalid video rotation: ${e.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(e.rotation)&&(e.rotation.length!==9||e.rotation.some(r=>!Number.isFinite(r))))throw new TypeError(`Invalid video transformation matrix: ${e.rotation.join()}`);if(e.frameRate!==void 0&&(!Number.isInteger(e.frameRate)||e.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${e.frameRate}. Must be a positive integer.`);this._addTrack("video",t,e)}addAudioTrack(t,e={}){if(!(t instanceof H))throw new TypeError("source must be an AudioSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",t,e)}addSubtitleTrack(t,e={}){if(!(t instanceof ce))throw new TypeError("source must be a SubtitleSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",t,e)}_addTrack(t,e,r){if(this._started)throw new Error("Cannot add track after output has started.");if(e._connectedTrack)throw new Error("Source is already used for a track.");let a={id:this._tracks.length+1,output:this,type:t,source:e,metadata:r};this._muxer.beforeTrackAdd(a),this._tracks.push(a),e._connectedTrack=a}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let t=await this._mutex.acquire();await this._muxer.start();for(let e of this._tracks)e.source._start();t()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let t=await this._mutex.acquire(),e=this._tracks.map(r=>r.source._flush());await Promise.all(e),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),t()}};var Ce=class{constructor(){this._sizePromise=null}_getSize(){return this._sizePromise??=this._retrieveSize()}},yt=class extends Ce{constructor(t){super(),this._buffer=t}async _read(t,e){return new Uint8Array(this._buffer,t,e-t)}async _retrieveSize(){return this._buffer.byteLength}},vt=class extends Ce{constructor(t){super(),this._blob=t}async _read(t,e){let a=await this._blob.slice(t,e).arrayBuffer();return new Uint8Array(a)}async _retrieveSize(){return this._blob.size}};var Le=class{constructor(t){this.input=t}};var Se=class{constructor(t){this._backing=t}isVideoTrack(){return this instanceof ue}isAudioTrack(){return this instanceof me}computeDuration(){return this._backing.computeDuration()}},ue=class extends Se{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getCodedWidth(){return this._backing.getCodedWidth()}getCodedHeight(){return this._backing.getCodedHeight()}getRotation(){return this._backing.getRotation()}async getDisplayWidth(){return await this._backing.getRotation()%180===0?this._backing.getCodedWidth():this._backing.getCodedHeight()}async getDisplayHeight(){return await this._backing.getRotation()%180===0?this._backing.getCodedHeight():this._backing.getCodedWidth()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},me=class extends Se{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var de=class{constructor(t,e=1/0){this.source=t;this.maxStorableBytes=e;this.loadedSegments=[];this.loadingSegments=[];this.sourceSizePromise=null;this.nextAge=0;this.totalStoredBytes=0}async loadRange(t,e){e=Math.min(e,await this.source._getSize());let r=this.loadingSegments.find(c=>c.start<=t&&c.end>=e);if(r){await r.promise;return}if(this.loadedSegments.some(c=>c.start<=t&&c.end>=e))return;let s=this.source._read(t,e),n={start:t,end:e,promise:s};this.loadingSegments.push(n);let o=await s;Ut(this.loadingSegments,n),this.insertIntoLoadedSegments(t,o)}insertIntoLoadedSegments(t,e){let r={start:t,end:t+e.byteLength,bytes:e,view:new DataView(e.buffer),age:this.nextAge++},a=I(this.loadedSegments,t,s=>s.start);(a===-1||this.loadedSegments[a].start=r.end)break;r.start<=n.start&&n.end<=r.end&&(this.loadedSegments.splice(s,1),s--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let s=null,n=-1;for(let o=0;os.start),a=null;if(r!==-1)for(let s=r;st)break;if(e<=n.end){a=n;break}}if(!a)throw new Error(`No segment loaded for range [${t}, ${e}).`);return a.age=this.nextAge++,{view:a.view,offset:a.bytes.byteOffset+t-a.start}}forgetRange(t,e){if(e<=t)return;let r=I(this.loadedSegments,t,s=>s.start);if(r===-1)return;let a=this.loadedSegments[r];a.start!==t||a.end!==e||(this.loadedSegments.splice(r,1),this.totalStoredBytes-=a.bytes.byteLength)}};var J=class{constructor(t){this.reader=t;this.pos=0}readRange(t,e){let{view:r,offset:a}=this.reader.getViewAndOffset(t,e);return new Uint8Array(r.buffer,a,e-t)}readU8(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,t.getUint8(e)}readU16(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,t.getUint16(e,!1)}readU24(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let r=t.getUint16(e,!1),a=t.getUint8(e+2);return r*256+a}readS32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getUint32(e,!1)}readI32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU64(){let t=this.readU32(),e=this.readU32();return t*4294967296+e}readF64(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,t.getFloat64(e,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(t){let{view:e,offset:r}=this.reader.getViewAndOffset(this.pos,this.pos+t);this.pos+=t;let a="";for(let s=0;sa.computeDuration()));return Math.max(0,...r)}async getTracks(){return await this.readMetadata(),this.tracks.map(e=>e.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let r=await Promise.all(this.tracks.map(s=>s.inputTrack.getCodecMimeType())),a=[...new Set(r)];e+=`; codecs="${a.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.pos=0&&aa.presentationTimestamp-s.presentationTimestamp),e.sampleTable}async readFragment(){let e=this.isobmffReader.pos;await this.isobmffReader.reader.loadRange(this.isobmffReader.pos,this.isobmffReader.pos+16);let r=this.isobmffReader.readBoxHeader();d(r.name==="moof"),await this.isobmffReader.reader.loadRange(e,e+r.totalSize),this.isobmffReader.pos=e,this.traverseBox();let a=W(this.fragments,e,n=>n.moofOffset);d(a!==-1);let s=this.fragments[a];d(s.moofOffset===e),this.isobmffReader.reader.forgetRange(e,e+r.totalSize);for(let[n,o]of s.trackData){if(o.startTimestampIsFinal)continue;let c=this.tracks.find(f=>f.id===n);this.isobmffReader.pos=0;let u=null,m=null,l=I(c.fragments,e-1,f=>f.moofOffset);for(l!==-1&&(u=c.fragments[l],m=u,this.isobmffReader.pos=u.moofOffset+u.moofSize);this.isobmffReader.posp.moofOffset);if(b===-1){this.isobmffReader.pos=f;let p=await this.readFragment();u&&(u.nextFragment=p),u=p}else{let p=this.fragments[b];u&&(u.nextFragment=p),u=p}}this.isobmffReader.pos=f+g.totalSize}u&&u.trackData.has(n)&&(m=u)}if(m){let f=m.trackData.get(n);d(f.startTimestampIsFinal),fr(o,f.endTimestamp)}o.startTimestampIsFinal=!0}return s}readContiguousBoxes(e){let r=this.isobmffReader.pos;for(;this.isobmffReader.pos-rl.every((f,g)=>f===u[g]));m===-1?s.rotation=0:s.rotation=90*m}break;case"mdhd":{let s=this.currentTrack;d(s);let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3,n===0?(this.isobmffReader.pos+=8,s.timescale=this.isobmffReader.readU32(),s.durationInTimescale=this.isobmffReader.readU32()):n===1&&(this.isobmffReader.pos+=16,s.timescale=this.isobmffReader.readU32(),s.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let s=this.currentTrack;d(s),this.isobmffReader.pos+=8;let n=this.isobmffReader.readAscii(4);n==="vide"?s.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:n==="soun"&&(s.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let s=this.currentTrack;d(s),s.sampleTableOffset=e,this.readContiguousBoxes(r.contentSize)}break;case"stsd":{let s=this.currentTrack;if(d(s),s.info===null||s.sampleTable)break;let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=this.isobmffReader.readU32();for(let c=0;c0){if(m===1)this.isobmffReader.pos+=4*4;else if(m===2){this.isobmffReader.pos+=4,f=this.isobmffReader.readF64(),l=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),b=this.isobmffReader.readU32(),p=this.isobmffReader.readU32(),k=this.isobmffReader.readU32()}}s.info.numberOfChannels=l,s.info.sampleRate=f,this.readContiguousBoxes(e+u.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let s=this.currentTrack;d(s&&s.info),s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"hvcC":{let s=this.currentTrack;d(s&&s.info),s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"colr":{let s=this.currentTrack;if(d(s&&s.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let o=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),u=this.isobmffReader.readU16(),m=!!(this.isobmffReader.readU8()&128);s.info.colorSpace={primaries:Mt[o],transfer:Vt[c],matrix:Dt[u],fullRange:m}}break;case"wave":r.totalSize>8&&this.readContiguousBoxes(r.contentSize);break;case"esds":{let s=this.currentTrack;d(s&&s.info),this.isobmffReader.pos+=4;let n=this.isobmffReader.readU8();d(n===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let o=this.isobmffReader.readU8(),c=(o&128)!==0,u=(o&64)!==0,m=(o&32)!==0;if(c&&(this.isobmffReader.pos+=2),u){let p=this.isobmffReader.readU8();this.isobmffReader.pos+=p}m&&(this.isobmffReader.pos+=2);let l=this.isobmffReader.readU8();d(l===4),this.isobmffReader.readIsomVariableInteger();let f=this.isobmffReader.readU8();d(f===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();d(g===5);let b=this.isobmffReader.readIsomVariableInteger();s.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+b)}break;case"stts":{let s=this.currentTrack;if(d(s),!s.sampleTable)break;this.isobmffReader.pos+=4;let n=this.isobmffReader.readU32(),o=0,c=0;for(let u=0;uv.id===n);if(!o)break;o.fragmentLookupTable=[];let c=this.isobmffReader.readU32(),u=(c&48)>>4,m=(c&12)>>2,l=c&3,f=this.isobmffReader,g=[f.readU8.bind(f),f.readU16.bind(f),f.readU24.bind(f),f.readU32.bind(f)],b=g[u],p=g[m],k=g[l],w=this.isobmffReader.readU32();for(let v=0;vn.moofOffset);this.fragments.splice(s+1,0,this.currentFragment);for(let[,n]of this.currentFragment.trackData){let o=n.samples[0],c=R(n.samples);this.currentFragment.dataStart=Math.min(this.currentFragment.dataStart,o.byteOffset),this.currentFragment.dataEnd=Math.max(this.currentFragment.dataEnd,c.byteOffset+c.byteSize)}this.currentFragment=null}break;case"traf":if(d(this.currentFragment),this.readContiguousBoxes(r.contentSize),this.currentTrack){let s=this.currentFragment.trackData.get(this.currentTrack.id);if(s){let n=I(this.currentTrack.fragments,this.currentFragment.moofOffset,c=>c.moofOffset);this.currentTrack.fragments.splice(n+1,0,this.currentFragment);let{currentFragmentState:o}=this.currentTrack;d(o),o.startTimestamp!==null&&(fr(s,o.startTimestamp),s.startTimestampIsFinal=!0)}this.currentTrack.currentFragmentState=null,this.currentTrack=null}break;case"tfhd":{d(this.currentFragment),this.isobmffReader.pos+=1;let s=this.isobmffReader.readU24(),n=!!(s&1),o=!!(s&2),c=!!(s&8),u=!!(s&16),m=!!(s&32),l=!!(s&65536),f=!!(s&131072),g=this.isobmffReader.readU32(),b=this.tracks.find(k=>k.id===g);if(!b)break;let p=this.fragmentTrackDefaults.find(k=>k.trackId===g);this.currentTrack=b,b.currentFragmentState={baseDataOffset:this.currentFragment.implicitBaseDataOffset,sampleDescriptionIndex:p?.defaultSampleDescriptionIndex??null,defaultSampleDuration:p?.defaultSampleDuration??null,defaultSampleSize:p?.defaultSampleSize??null,defaultSampleFlags:p?.defaultSampleFlags??null,startTimestamp:null},n?b.currentFragmentState.baseDataOffset=this.isobmffReader.readU64():f&&(b.currentFragmentState.baseDataOffset=this.currentFragment.moofOffset),o&&(b.currentFragmentState.sampleDescriptionIndex=this.isobmffReader.readU32()),c&&(b.currentFragmentState.defaultSampleDuration=this.isobmffReader.readU32()),u&&(b.currentFragmentState.defaultSampleSize=this.isobmffReader.readU32()),m&&(b.currentFragmentState.defaultSampleFlags=this.isobmffReader.readU32()),l&&(b.currentFragmentState.defaultSampleDuration=0)}break;case"tfdt":{let s=this.currentTrack;if(!s)break;d(s.currentFragmentState);let n=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=n===0?this.isobmffReader.readU32():this.isobmffReader.readU64();s.currentFragmentState.startTimestamp=o}break;case"trun":{let s=this.currentTrack;if(!s)break;if(d(this.currentFragment),d(s.currentFragmentState),this.currentFragment.trackData.has(s.id))throw new Error("Can't have two trun boxes for the same track in one fragment.");let n=this.isobmffReader.readU8(),o=this.isobmffReader.readU24(),c=!!(o&1),u=!!(o&4),m=!!(o&256),l=!!(o&512),f=!!(o&1024),g=!!(o&2048),b=this.isobmffReader.readU32(),p=s.currentFragmentState.baseDataOffset;c&&(p+=this.isobmffReader.readI32());let k=null;u&&(k=this.isobmffReader.readU32());let w=p;if(b===0){this.currentFragment.implicitBaseDataOffset=w;break}let v=0,T={startTimestamp:0,endTimestamp:0,samples:[],presentationTimestamps:[],startTimestampIsFinal:!1};this.currentFragment.trackData.set(s.id,T);for(let z=0;z({presentationTimestamp:z.presentationTimestamp,sampleIndex:V})).sort((z,V)=>z.presentationTimestamp-V.presentationTimestamp);let A=T.samples[T.presentationTimestamps[0].sampleIndex],F=T.samples[R(T.presentationTimestamps).sampleIndex];T.startTimestamp=A.presentationTimestamp,T.endTimestamp=F.presentationTimestamp+F.duration,this.currentFragment.implicitBaseDataOffset=w}break}this.isobmffReader.pos=a}},Ke=class{constructor(t){this.internalTrack=t;this.chunkToSampleIndex=new WeakMap;this.chunkToFragmentLocation=new WeakMap}getCodec(){throw new Error("Not implemented on base class.")}async computeDuration(){let e=(await this.getChunk(1/0,{metadataOnly:!0}))?.timestamp;return e?e/1e6:0}async getFirstChunk(t){return this.internalTrack.demuxer.isFragmented?this.performFragmentedLookup(()=>{let e=this.internalTrack.fragments[0];return{fragmentIndex:e?0:-1,sampleIndex:e?0:-1,correctSampleFound:!!e}},0,1/0,t):this.fetchChunkForSampleIndex(0,t)}roundToMicrosecond(t){return(Math.floor(t*1e6)+.99999999)/1e6}async getChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findSampleInFragmentsForTimestamp(r),r,r,e);{let a=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),s=lr(a,r);return this.fetchChunkForSampleIndex(s,e)}}async getNextChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let a=this.chunkToFragmentLocation.get(t);if(a===void 0)throw new Error("Chunk was not created from this track.");let s=a.fragment.trackData.get(this.internalTrack.id),n=s.samples[a.sampleIndex],o=W(this.internalTrack.fragments,a.fragment.moofOffset,c=>c.moofOffset);return d(o!==-1),this.performFragmentedLookup(()=>{if(a.sampleIndex+1l.moofOffset);return d(m!==-1),{fragmentIndex:m,sampleIndex:0,correctSampleFound:!0}}return{fragmentIndex:o,sampleIndex:-1,correctSampleFound:!1}}},n.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");return this.fetchChunkForSampleIndex(r+1,e)}async getKeyChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findKeySampleInFragmentsForTimestamp(r),r,r,e);let a=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),s=lr(a,r),n=s===-1?-1:yi(a,s);return this.fetchChunkForSampleIndex(n,e)}async getNextKeyChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let n=this.chunkToFragmentLocation.get(t);if(n===void 0)throw new Error("Chunk was not created from this track.");let o=n.fragment.trackData.get(this.internalTrack.id),c=o.samples[n.sampleIndex],u=W(this.internalTrack.fragments,n.fragment.moofOffset,m=>m.moofOffset);return d(u!==-1),this.performFragmentedLookup(()=>{let m=o.samples.findIndex((l,f)=>l.isKeyFrame&&f>n.sampleIndex);if(m!==-1)return{fragmentIndex:u,sampleIndex:m,correctSampleFound:!0};{let l=n.fragment;for(;l.nextFragment;){l=l.nextFragment;let f=l.trackData.get(this.internalTrack.id);if(f){let g=W(this.internalTrack.fragments,l.moofOffset,p=>p.moofOffset);d(g!==-1);let b=f.samples.findIndex(p=>p.isKeyFrame);if(b===-1)throw new Error("Not supported: Fragment does not contain key sample.");return{fragmentIndex:g,sampleIndex:b,correctSampleFound:!0}}}return{fragmentIndex:u,sampleIndex:-1,correctSampleFound:!1}}},c.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");let a=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),s=vi(a,r);return this.fetchChunkForSampleIndex(s,e)}async fetchChunkForSampleIndex(t,e){if(t===-1)return null;let r=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=wi(r,t);if(!a)return null;let s;e.metadataOnly?s=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(a.chunkOffset,a.chunkOffset+a.chunkSize),s=this.internalTrack.demuxer.chunkReader.readRange(a.sampleOffset,a.sampleOffset+a.sampleSize));let n=1e6*a.presentationTimestamp/this.internalTrack.timescale,o=1e6*a.duration/this.internalTrack.timescale,c=this.createChunk(s,n,o,a.isKeyFrame);return this.chunkToSampleIndex.set(c,t),c}async fetchChunkInFragment(t,e,r){if(e===-1)return null;let s=t.trackData.get(this.internalTrack.id).samples[e];d(s);let n;r.metadataOnly?n=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(t.dataStart,t.dataEnd),n=this.internalTrack.demuxer.chunkReader.readRange(s.byteOffset,s.byteOffset+s.byteSize));let o=1e6*s.presentationTimestamp/this.internalTrack.timescale,c=1e6*s.duration/this.internalTrack.timescale,u=this.createChunk(n,o,c,s.isKeyFrame);return this.chunkToFragmentLocation.set(u,{fragment:t,sampleIndex:e}),u}findSampleInFragmentsForTimestamp(t){let e=I(this.internalTrack.fragments,t,s=>s.trackData.get(this.internalTrack.id).startTimestamp),r=-1,a=!1;if(e!==-1){let n=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=I(n.presentationTimestamps,t,c=>c.presentationTimestamp);d(o!==-1),r=n.presentationTimestamps[o].sampleIndex,a=ts.trackData.get(this.internalTrack.id).startTimestamp),r=-1,a=!1;if(e!==-1){let n=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=Bt(n.presentationTimestamps,u=>n.samples[u.sampleIndex].isKeyFrame&&u.presentationTimestamp<=t);if(o===-1)throw new Error("Not supported: Fragment does not begin with a key sample.");r=n.presentationTimestamps[o].sampleIndex,a=tw.timestamp);k!==-1&&(p=this.internalTrack.fragmentLookupTable[k])}if(o===-1)m.pos=p?.moofOffset??0;else{let k=this.internalTrack.fragments[o];!p||k.moofOffset>=k.moofOffset?(m.pos=k.moofOffset+k.moofSize,f=k):m.pos=p.moofOffset}for(;m.posr)break;if(f.nextFragment){m.pos=f.nextFragment.moofOffset+f.nextFragment.moofSize,f=f.nextFragment;continue}}await m.reader.loadRange(m.pos,m.pos+16);let k=m.pos,w=m.readBoxHeader();if(w.name==="moof"){let v=W(s.fragments,k,T=>T.moofOffset);if(v===-1){m.pos=k;let T=await s.readFragment();f&&(f.nextFragment=T),f=T;let{fragmentIndex:A,sampleIndex:F,correctSampleFound:z}=t();if(z){let V=this.internalTrack.fragments[A];return this.fetchChunkInFragment(V,F,a)}A!==-1&&(g=A,b=F)}else{let T=s.fragments[v];f&&(f.nextFragment=T),f=T}}m.pos=k+w.totalSize}if(g!==-1){let k=this.internalTrack.fragments[g];return this.fetchChunkInFragment(k,b,a)}return null}finally{n()}}},_t=class extends Ke{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getCodedWidth(){return this.internalTrack.info.width}async getCodedHeight(){return this.internalTrack.info.height}async getRotation(){return this.internalTrack.rotation}async getDecoderConfig(){return{codec:ir(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),codedWidth:this.internalTrack.info.width,codedHeight:this.internalTrack.info.height,description:this.internalTrack.info.codecDescription??void 0,colorSpace:this.internalTrack.info.colorSpace??void 0}}createChunk(t,e,r,a){return new EncodedVideoChunk({data:t,timestamp:e,duration:r,type:a?"key":"delta"})}},It=class extends Ke{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getNumberOfChannels(){return this.internalTrack.info.numberOfChannels}async getSampleRate(){return this.internalTrack.info.sampleRate}async getDecoderConfig(){return{codec:ar(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),numberOfChannels:this.internalTrack.info.numberOfChannels,sampleRate:this.internalTrack.info.sampleRate,description:this.internalTrack.info.codecDescription??void 0}}createChunk(t,e,r,a){return new EncodedAudioChunk({data:t,timestamp:e,duration:r,type:a?"key":"delta"})}},lr=(i,t)=>{let e=I(i.presentationTimestamps,t,r=>r.presentationTimestamp);return e===-1?-1:i.presentationTimestamps[e].sampleIndex},wi=(i,t)=>{let e=I(i.sampleTimingEntries,t,p=>p.startIndex),r=i.sampleTimingEntries[e];if(!r||r.startIndex+r.count<=t)return null;let s=r.startDecodeTimestamp+(t-r.startIndex)*r.delta,n=I(i.sampleCompositionTimeOffsets,t,p=>p.startIndex),o=i.sampleCompositionTimeOffsets[n];o&&(s+=o.offset);let c=i.sampleSizes[Math.min(t,i.sampleSizes.length-1)],u=I(i.sampleToChunk,t,p=>p.startSampleIndex),m=i.sampleToChunk[u];d(m);let l=m.startChunkIndex+Math.floor((t-m.startSampleIndex)/m.samplesPerChunk),f=i.chunkOffsets[l],g=0,b=f;if(i.sampleSizes.length===1)b+=c*(t-m.startSampleIndex),g+=c*m.samplesPerChunk;else{let p=m.startSampleIndex+(l-m.startChunkIndex)*m.samplesPerChunk;for(let k=p;kp)!==-1:!0}},yi=(i,t)=>{if(!i.keySampleIndices)return t;let e=I(i.keySampleIndices,t,r=>r);return i.keySampleIndices[e]??-1},vi=(i,t)=>{if(!i.keySampleIndices)return t+1;let e=I(i.keySampleIndices,t,r=>r);return i.keySampleIndices[e+1]??-1},fr=(i,t)=>{i.startTimestamp+=t,i.endTimestamp+=t;for(let e of i.samples)e.presentationTimestamp+=t;for(let e of i.presentationTimestamps)e.presentationTimestamp+=t};var we=class{},$e=class extends we{async _canReadInput(t){if(await t._mainReader.source._getSize()<8)return!1;let r=new J(t._mainReader);return r.pos=4,r.readAscii(4)==="ftyp"}_createDemuxer(t){return new Qe(t)}},je=class extends we{async _canReadInput(){return!1}_createDemuxer(){throw new Error("Not implemented")}},qe=new $e,_i=qe,Ii=qe,At=new je,pr=At,Ai=At,Ri=[qe,pr];var Rt=class{constructor(t){this._demuxerPromise=null;this._format=null;this._formats=t.formats,this._source=t.source,this._mainReader=new de(t.source)}_getDemuxer(){return this._demuxerPromise??=(async()=>{await this._mainReader.loadRange(0,4096);for(let t of this._formats)if(await t._canReadInput(this))return this._format=t,t._createDemuxer(this);throw new Error("Input has an unrecognizable format.")})()}async getFormat(){return await this._getDemuxer(),d(this._format),this._format}async computeDuration(){return(await this._getDemuxer()).computeDuration()}async getTracks(){return(await this._getDemuxer()).getTracks()}async getVideoTracks(){return(await this.getTracks()).filter(e=>e.isVideoTrack())}async getPrimaryVideoTrack(){return(await this.getTracks()).find(e=>e.isVideoTrack())??null}async getAudioTracks(){return(await this.getTracks()).filter(e=>e.isAudioTrack())}async getPrimaryAudioTrack(){return(await this.getTracks()).find(e=>e.isAudioTrack())??null}async getMimeType(){return(await this._getDemuxer()).getMimeType()}};var ye=class{async*chunks(t,e=1/0){let r=[],{promise:a,resolve:s}=E(),{promise:n,resolve:o}=E(),c=!1,u=[],m=()=>Math.max(2,u.length);(async()=>{let l=t??await this.getFirstChunk();for(;l&&!c&&!(l.timestamp/1e6>=e);){if(r.length>m()){({promise:n,resolve:o}=E()),await n;continue}r.push(l),s(),{promise:a,resolve:s}=E(),l=await this.getNextChunk(l)}c=!0,s()})();try{for(;;)if(r.length>0){yield r.shift();let l=performance.now();for(u.push(l);u.length>0&&l-u[0]>=1e3;)u.shift();o()}else if(!c)await a;else break}finally{c=!0,o()}}},ve=class{_duplicateFrame(t){return structuredClone(t)}async*mediaFramesAtTimestamps(t){let e=Wt(t),r=[],a=[],{promise:s,resolve:n}=E(),{promise:o,resolve:c}=E(),u=!1,m=!1,l=8,f=null,g=p=>{a.push(p),n(),{promise:s,resolve:n}=E()},b=await this._createDecoder(p=>{if(c(),m){p.close();return}let k=!1;for(;r.length>0&&r[0]===p.timestamp;)g(this._duplicateFrame(p)),r.shift(),k=!0;k?(f?.close(),f=p):p.close()});(async()=>{let p=this._createChunkDrain(),k=null,w=null;for await(let v of e){for(;a.length+b.decodeQueueSize>l;)({promise:o,resolve:c}=E()),await o;if(m)break;let T=await p.getChunk(v);if(!T){g(null);continue}let A=await p.getKeyChunk(v);if(!A){g(null);continue}for(r.push(T.timestamp),k&&A.timestamp===k.timestamp&&T.timestamp>=w.timestamp?(d(w),T.timestamp===w.timestamp&&r.length===1&&(f&&g(this._duplicateFrame(f)),r.shift())):(k=A,w=A,b.decode(A));w.timestamp!==T.timestamp;){let F=await p.getNextChunk(w);d(F),w=F,b.decode(F)}b.decodeQueueSize>=10&&await new Promise(F=>b.addEventListener("dequeue",F,{once:!0}))}await b.flush(),b.close(),u=!0,n()})();try{for(;;)if(a.length>0){let p=a.shift();d(p!==void 0),yield p,c()}else if(!u)await s;else break}finally{m=!0,c();for(let p of a)p?.close();f?.close()}}async*mediaFramesInRange(t=0,e=1/0){let r=[],a=!1,s=null,{promise:n,resolve:o}=E(),{promise:c,resolve:u}=E(),m=!1,l=!1,f=8,g=await this._createDecoder(k=>{u();let w=k.timestamp/1e6;if(w>=e&&(l=!0),l){k.close();return}s&&(w>t?(r.push(s),a=!0):s.close()),w>=t&&(r.push(k),a=!0),s=a?null:k,r.length>0&&(o(),{promise:n,resolve:o}=E())}),b=this._createChunkDrain(),p=await b.getKeyChunk(t)??await b.getFirstChunk();if(p){(async()=>{let k=p,w=1/0;if(e<1/0){let T=await b.getChunk(e),A=T?T.type==="key"&&T.timestamp/1e6===e?T:await b.getNextKeyChunk(T):null;A&&(w=A.timestamp/1e6)}let v=b.chunks(p,w);for(await v.next();k&&!l;){if(r.length+g.decodeQueueSize>f){({promise:c,resolve:u}=E()),await c;continue}g.decode(k);let T=await v.next();if(T.done)break;k=T.value}await v.return(),await g.flush(),g.close(),!a&&s&&r.push(s),m=!0,o()})();try{for(;;)if(r.length>0)yield r.shift(),u();else if(!m)await n;else break}finally{l=!0,u();for(let k of r)k.close()}}}},Xe=class extends ye{constructor(t){super(),this._videoTrack=t}getFirstChunk(t={}){return this._videoTrack._backing.getFirstChunk(t)}getChunk(t,e={}){return this._videoTrack._backing.getChunk(t,e)}getNextChunk(t,e={}){return this._videoTrack._backing.getNextChunk(t,e)}getKeyChunk(t,e={}){return this._videoTrack._backing.getKeyChunk(t,e)}getNextKeyChunk(t,e={}){return this._videoTrack._backing.getNextKeyChunk(t,e)}},Ge=class extends ve{constructor(e){super();this._decoderConfig=null;this._videoTrack=e}async _createDecoder(e){this._decoderConfig??=await this._videoTrack.getDecoderConfig();let r=new VideoDecoder({output:e,error:a=>console.error(a)});return r.configure(this._decoderConfig),r}_createChunkDrain(){return new Xe(this._videoTrack)}async getFrame(e){for await(let r of this.mediaFramesAtTimestamps([e]))return r;throw new Error("Internal error: Iterator returned nothing.")}frames(e=0,r=1/0){return this.mediaFramesInRange(e,r)}framesAtTimestamps(e){return this.mediaFramesAtTimestamps(e)}},Ot=class{constructor(t,e){this._videoTrack=t,this._dimensions=e,this._videoFrameDrain=new Ge(t)}async _videoFrameToWrappedCanvas(t){let e=this._dimensions?.width??await this._videoTrack.getDisplayWidth(),r=this._dimensions?.height??await this._videoTrack.getDisplayHeight(),a=await this._videoTrack.getRotation(),s=document.createElement("canvas");s.width=e,s.height=r;let n=s.getContext("2d",{alpha:!1});d(n),n.translate(e/2,r/2),n.rotate(a*Math.PI/180),n.translate(-e/2,-r/2);let[o,c]=a%180===0?[e,r]:[r,e];n.drawImage(t,(e-o)/2,(r-c)/2,o,c);let u={canvas:s,timestamp:t.timestamp/1e6,duration:(t.duration??0)/1e6};return t.close(),u}async getCanvas(t){let e=await this._videoFrameDrain.getFrame(t);return e&&this._videoFrameToWrappedCanvas(e)}async*canvases(t=0,e=1/0){for await(let r of this._videoFrameDrain.frames(t,e))yield this._videoFrameToWrappedCanvas(r)}async*canvasesAtTimestamps(t){for await(let e of this._videoFrameDrain.framesAtTimestamps(t))yield e&&this._videoFrameToWrappedCanvas(e)}},Ye=class extends ye{constructor(t){super(),this._audioTrack=t}getFirstChunk(t={}){return this._audioTrack._backing.getFirstChunk(t)}getChunk(t,e={}){return this._audioTrack._backing.getChunk(t,e)}getNextChunk(t,e={}){return this._audioTrack._backing.getNextChunk(t,e)}getKeyChunk(t,e={}){return this._audioTrack._backing.getKeyChunk(t,e)}getNextKeyChunk(t,e={}){return this._audioTrack._backing.getNextKeyChunk(t,e)}},Ze=class extends ve{constructor(e){super();this._decoderConfig=null;this._audioTrack=e}async _createDecoder(e){this._decoderConfig??=await this._audioTrack.getDecoderConfig();let r=new AudioDecoder({output:e,error:a=>console.error(a)});return r.configure(this._decoderConfig),r}_createChunkDrain(){return new Ye(this._audioTrack)}async getData(e){for await(let r of this.mediaFramesAtTimestamps([e]))return r;throw new Error("Internal error: Iterator returned nothing.")}data(e=0,r=1/0){return this.mediaFramesInRange(e,r)}dataAtTimestamps(e){return this.mediaFramesAtTimestamps(e)}},Et=class{constructor(t){this._audioDataDrain=new Ze(t)}_audioDataToWrappedArrayBuffer(t){let e=new AudioBuffer({numberOfChannels:t.numberOfChannels,length:t.numberOfFrames,sampleRate:t.sampleRate}),r=new Float32Array(t.allocationSize({planeIndex:0,format:"f32-planar"})/4);for(let n=0;nr.track===e))return;e:for(;;){let e=null,r=1/0;for(let a of this.trackDatas){if(a.chunkQueue.length===0&&!a.track.source._closed)break e;a.chunkQueue.length>0&&a.chunkQueue[0].timestamp=2&&n++;let u={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];Mt(r.data,n+0,n+3,u)}createInternalChunk(e,r,n,a,s=null){return{data:e,type:a,timestamp:r,duration:n,additions:s}}writeBlock(e,r){this.segment||(this.createTracks(),this.createSegment());let n=Math.floor(1e3*r.timestamp),a=this.trackDatas.every(l=>{if(l.track.source._closed)return!0;if(e===l)return r.type==="key";let f=l.chunkQueue[0];return f&&f.type==="key"});(!this.currentCluster||a&&n-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(n);let s=n-this.currentClusterMsTimestamp;if(s<0)return;if(s>=ht)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${ht} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${ht} milliseconds.`);let c=new Uint8Array(4),u=new DataView(c.buffer);u.setUint8(0,128|e.track.id),u.setInt16(1,s,!1);let d=Math.floor(1e3*r.duration);if(d===0&&!r.additions){u.setUint8(3,+(r.type==="key")<<7);let l={id:163,data:[c,r.data]};this.writeEBML(l)}else{let l={id:160,data:[{id:161,data:[c,r.data]},r.type==="delta"?{id:251,data:new we(e.lastWrittenMsTimestamp-n)}:null,r.additions?{id:30113,data:[{id:166,data:[{id:165,data:r.additions},{id:238,data:1}]}]}:null,d>0?{id:155,data:d}:null]};this.writeEBML(l)}this.duration=Math.max(this.duration,n+d),e.lastWrittenMsTimestamp=n,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format._options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format._options.streamable?-1:hr,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){m(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),r=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,hr),this.writer.seek(r);let n=this.offsets.get(this.currentCluster)-this.segmentDataOffset;m(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(a=>({id:183,data:[{id:247,data:a.track.id},{id:241,data:n}]}))]})}async onTrackClose(){let e=await this.mutex.acquire();await this.interleaveChunks(),e()}async finalize(){let e=await this.mutex.acquire();this.segment||(this.createTracks(),this.createSegment());for(let r of this.trackDatas)for(;r.chunkQueue.length>0;)this.writeBlock(r,r.chunkQueue.shift());if(!this.format._options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),m(this.cues),this.writeEBML(this.cues),!this.format._options.streamable){let r=this.writer.getPos(),n=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(n,fr),this.segmentDuration.data=new me(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(r)}e()}};var re=class{},pt=class extends re{constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(t.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super(),this._options=t}_createMuxer(t){return new He(t,this)}},Qe=class extends re{constructor(t={}){if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(t.streamable!==void 0&&typeof t.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super(),this._options=t}_createMuxer(t){return new Le(t,this)}},le=class extends Qe{};var fe=class{constructor(){this._connectedTrack=null;this._closed=!1;this._offsetTimestamps=!1}_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},K=class extends fe{constructor(e){super();this._connectedTrack=null;if(!ue.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${ue.join(", ")}.`);this._codec=e}},bt=class extends K{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedVideoChunk(this._connectedTrack,t,e)}},wi=5,yi=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!ue.includes(i.codec))throw new TypeError(`Invalid video codec '${i.codec}'. Must be one of: ${ue.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(i.latencyMode!==void 0&&!["quality","realtime"].includes(i.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},ye=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastMultipleOfKeyFrameInterval=-1;this.lastWidth=null;this.lastHeight=null;yi(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(t.codedWidth!==this.lastWidth||t.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${t.codedWidth}x${t.codedHeight}.`)}else this.lastWidth=t.codedWidth,this.lastHeight=t.codedHeight;this.ensureEncoder(t),m(this.encoder);let e=Math.floor(t.timestamp/1e6/wi);this.encoder.encode(t,{keyFrame:e!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=e,this.encoder.encodeQueueSize>=4&&await new Promise(r=>this.encoder.addEventListener("dequeue",r,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new VideoEncoder({output:(e,r)=>void this.muxer.addEncodedVideoChunk(this.source._connectedTrack,e,r),error:e=>console.error("Video encode error:",e)}),this.encoder.configure({codec:nr(this.codecConfig.codec,t.codedWidth,t.codedHeight,this.codecConfig.bitrate),width:t.codedWidth,height:t.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode,...ur(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},kt=class extends K{constructor(t){super(t.codec),this._encoder=new ye(this,t)}digest(t){if(!(t instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},gt=class extends K{constructor(t,e){if(!(t instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(e.codec),this._encoder=new ye(this,e),this._canvas=t}digest(t,e=0){if(!Number.isFinite(t)||t<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(e)||e<0)throw new TypeError("duration must be a non-negative number.");let r=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*t),duration:Math.round(1e6*e),alpha:"discard"}),n=this._encoder.digest(r);return r.close(),n}_flush(){return this._encoder.flush()}},Tt=class extends K{constructor(e,r){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");r={...r,latencyMode:"realtime"};super(r.codec);this._abortController=null;this._offsetTimestamps=!0;this._encoder=new ye(this,r),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),r=new WritableStream({write:n=>{this._encoder.digest(n),n.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(n=>{n instanceof DOMException&&n.name==="AbortError"||console.error("Pipe error:",n)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},j=class extends fe{constructor(e){super();this._connectedTrack=null;if(!de.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${de.join(", ")}.`);this._codec=e}},xt=class extends j{constructor(t){super(t)}digest(t,e){if(!(t instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return this._ensureValidDigest(),this._connectedTrack.output._muxer.addEncodedAudioChunk(this._connectedTrack,t,e)}},Si=i=>{if(!i||typeof i!="object")throw new TypeError("Codec config must be an object.");if(!de.includes(i.codec))throw new TypeError(`Invalid audio codec '${i.codec}'. Must be one of: ${de.join(", ")}.`);if(!Number.isInteger(i.bitrate)||i.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},Se=class{constructor(t,e){this.source=t;this.codecConfig=e;this.encoder=null;this.muxer=null;this.lastNumberOfChannels=null;this.lastSampleRate=null;Si(e)}async digest(t){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(t.numberOfChannels!==this.lastNumberOfChannels||t.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${t.numberOfChannels} channels at ${t.sampleRate} Hz.`)}else this.lastNumberOfChannels=t.numberOfChannels,this.lastSampleRate=t.sampleRate;this.ensureEncoder(t),m(this.encoder),this.encoder.encode(t),this.encoder.encodeQueueSize>=4&&await new Promise(e=>this.encoder.addEventListener("dequeue",e,{once:!0})),await this.muxer.mutex.currentPromise}ensureEncoder(t){this.encoder||(this.encoder=new AudioEncoder({output:(e,r)=>void this.muxer.addEncodedAudioChunk(this.source._connectedTrack,e,r),error:e=>console.error("Audio encode error:",e)}),this.encoder.configure({codec:or(this.codecConfig.codec,t.numberOfChannels,t.sampleRate),numberOfChannels:t.numberOfChannels,sampleRate:t.sampleRate,bitrate:this.codecConfig.bitrate,...dr(this.codecConfig.codec)}),m(this.source._connectedTrack),this.muxer=this.source._connectedTrack.output._muxer)}async flush(){this.encoder&&(await this.encoder.flush(),this.encoder.close())}},Ct=class extends j{constructor(t){super(t.codec),this._encoder=new Se(this,t)}digest(t){if(!(t instanceof AudioData))throw new TypeError("audioData must be an AudioData.");return this._encoder.digest(t)}_flush(){return this._encoder.flush()}},wt=class extends j{constructor(e){super(e.codec);this._accumulatedFrameCount=0;this._encoder=new Se(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let r=e.numberOfChannels,n=e.sampleRate,a=e.length,s=new Float32Array(r*a);for(let u=0;u{this._encoder.digest(n),n.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(n=>{n instanceof DOMException&&n.name==="AbortError"||console.error("Pipe error:",n)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},he=class extends fe{constructor(e){super();this._connectedTrack=null;if(!Ue.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${Ue.join(", ")}.`);this._codec=e}},St=class extends he{constructor(t){super(t),this._parser=new Ee({codec:t,output:(e,r)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,e,r),error:e=>console.error("Subtitle parse error:",e)})}digest(t){if(typeof t!="string")throw new TypeError("text must be a string.");return this._ensureValidDigest(),this._parser.parse(t),this._connectedTrack.output._muxer.mutex.currentPromise}};var vt=class{constructor(t){this._tracks=[];this._started=!1;this._finalizing=!1;this._mutex=new $;if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(!(t.format instanceof re))throw new TypeError("options.format must be an OutputFormat.");if(!(t.target instanceof te))throw new TypeError("options.target must be a Target.");if(t.target._output)throw new Error("Target is already used for another output.");t.target._output=this,this._writer=t.target._createWriter(),this._muxer=t.format._createMuxer(this)}addVideoTrack(t,e={}){if(!(t instanceof K))throw new TypeError("source must be a VideoSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");if(typeof e.rotation=="number"&&![0,90,180,270].includes(e.rotation))throw new TypeError(`Invalid video rotation: ${e.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(e.rotation)&&(e.rotation.length!==9||e.rotation.some(r=>!Number.isFinite(r))))throw new TypeError(`Invalid video transformation matrix: ${e.rotation.join()}`);if(e.frameRate!==void 0&&(!Number.isInteger(e.frameRate)||e.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${e.frameRate}. Must be a positive integer.`);this._addTrack("video",t,e)}addAudioTrack(t,e={}){if(!(t instanceof j))throw new TypeError("source must be an AudioSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",t,e)}addSubtitleTrack(t,e={}){if(!(t instanceof he))throw new TypeError("source must be a SubtitleSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",t,e)}_addTrack(t,e,r){if(this._started)throw new Error("Cannot add track after output has started.");if(e._connectedTrack)throw new Error("Source is already used for a track.");let n={id:this._tracks.length+1,output:this,type:t,source:e,metadata:r};this._muxer.beforeTrackAdd(n),this._tracks.push(n),e._connectedTrack=n}async start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._writer.start();let t=await this._mutex.acquire();await this._muxer.start();for(let e of this._tracks)e.source._start();t()}async finalize(){if(!this._started)throw new Error("Cannot finalize before starting.");if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let t=await this._mutex.acquire(),e=this._tracks.map(r=>r.source._flush());await Promise.all(e),await this._muxer.finalize(),await this._writer.flush(),await this._writer.finalize(),t()}};var ie=class{constructor(){this._sizePromise=null}_getSize(){return this._sizePromise??=this._retrieveSize()}},It=class extends ie{constructor(t){if(!(t instanceof ArrayBuffer)&&!(t instanceof Uint8Array))throw new TypeError("buffer must be an ArrayBuffer or Uint8Array.");super(),this._bytes=t instanceof Uint8Array?t:new Uint8Array(t)}async _read(t,e){return this._bytes.subarray(t,e)}async _retrieveSize(){return this._bytes.byteLength}},_t=class extends ie{constructor(t){if(!(t instanceof Blob))throw new TypeError("blob must be a Blob.");super(),this._blob=t}async _read(t,e){let n=await this._blob.slice(t,e).arrayBuffer();return new Uint8Array(n)}async _retrieveSize(){return this._blob.size}};var Ke=class{constructor(t){this.input=t}};var ve=class{constructor(t){this._backing=t}isVideoTrack(){return this instanceof W}isAudioTrack(){return this instanceof H}computeDuration(){return this._backing.computeDuration()}},W=class extends ve{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getCodedWidth(){return this._backing.getCodedWidth()}getCodedHeight(){return this._backing.getCodedHeight()}getRotation(){return this._backing.getRotation()}async getDisplayWidth(){return await this._backing.getRotation()%180===0?this._backing.getCodedWidth():this._backing.getCodedHeight()}async getDisplayHeight(){return await this._backing.getRotation()%180===0?this._backing.getCodedHeight():this._backing.getCodedWidth()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}},H=class extends ve{constructor(t){super(t),this._backing=t}getCodec(){return this._backing.getCodec()}getNumberOfChannels(){return this._backing.getNumberOfChannels()}getSampleRate(){return this._backing.getSampleRate()}getDecoderConfig(){return this._backing.getDecoderConfig()}async getCodecMimeType(){return(await this.getDecoderConfig()).codec}};var pe=class{constructor(t,e=1/0){this.source=t;this.maxStorableBytes=e;this.loadedSegments=[];this.loadingSegments=[];this.sourceSizePromise=null;this.nextAge=0;this.totalStoredBytes=0}async loadRange(t,e){e=Math.min(e,await this.source._getSize());let r=this.loadingSegments.find(c=>c.start<=t&&c.end>=e);if(r){await r.promise;return}if(this.loadedSegments.some(c=>c.start<=t&&c.end>=e))return;let a=this.source._read(t,e),s={start:t,end:e,promise:a};this.loadingSegments.push(s);let o=await a;Nt(this.loadingSegments,s),this.insertIntoLoadedSegments(t,o)}insertIntoLoadedSegments(t,e){let r={start:t,end:t+e.byteLength,bytes:e,view:new DataView(e.buffer),age:this.nextAge++},n=_(this.loadedSegments,t,a=>a.start);(n===-1||this.loadedSegments[n].start=r.end)break;r.start<=s.start&&s.end<=r.end&&(this.loadedSegments.splice(a,1),a--)}for(;this.totalStoredBytes>this.maxStorableBytes&&this.loadedSegments.length>1;){let a=null,s=-1;for(let o=0;oa.start),n=null;if(r!==-1)for(let a=r;at)break;if(e<=s.end){n=s;break}}if(!n)throw new Error(`No segment loaded for range [${t}, ${e}).`);return n.age=this.nextAge++,{view:n.view,offset:n.bytes.byteOffset+t-n.start}}forgetRange(t,e){if(e<=t)return;let r=_(this.loadedSegments,t,a=>a.start);if(r===-1)return;let n=this.loadedSegments[r];n.start!==t||n.end!==e||(this.loadedSegments.splice(r,1),this.totalStoredBytes-=n.bytes.byteLength)}};var ae=class{constructor(t){this.reader=t;this.pos=0}readRange(t,e){let{view:r,offset:n}=this.reader.getViewAndOffset(t,e);return new Uint8Array(r.buffer,n,e-t)}readU8(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+1);return this.pos++,t.getUint8(e)}readU16(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+2);return this.pos+=2,t.getUint16(e,!1)}readU24(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+3);this.pos+=3;let r=t.getUint16(e,!1),n=t.getUint8(e+2);return r*256+n}readS32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getUint32(e,!1)}readI32(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+4);return this.pos+=4,t.getInt32(e,!1)}readU64(){let t=this.readU32(),e=this.readU32();return t*4294967296+e}readF64(){let{view:t,offset:e}=this.reader.getViewAndOffset(this.pos,this.pos+8);return this.pos+=8,t.getFloat64(e,!1)}readFixed_16_16(){return this.readS32()/65536}readFixed_2_30(){return this.readS32()/1073741824}readAscii(t){let{view:e,offset:r}=this.reader.getViewAndOffset(this.pos,this.pos+t);this.pos+=t;let n="";for(let a=0;an.computeDuration()));return Math.max(0,...r)}async getTracks(){return await this.readMetadata(),this.tracks.map(e=>e.inputTrack)}async getMimeType(){await this.readMetadata();let e="video/mp4";if(this.tracks.length>0){let r=await Promise.all(this.tracks.map(a=>a.inputTrack.getCodecMimeType())),n=[...new Set(r)];e+=`; codecs="${n.join(", ")}"`}return e}readMetadata(){return this.metadataPromise??=(async()=>{let e=await this.isobmffReader.reader.source._getSize();for(;this.isobmffReader.pos=0&&nn.presentationTimestamp-a.presentationTimestamp),e.sampleTable}async readFragment(){let e=this.isobmffReader.pos;await this.isobmffReader.reader.loadRange(this.isobmffReader.pos,this.isobmffReader.pos+16);let r=this.isobmffReader.readBoxHeader();m(r.name==="moof"),await this.isobmffReader.reader.loadRange(e,e+r.totalSize),this.isobmffReader.pos=e,this.traverseBox();let n=Q(this.fragments,e,s=>s.moofOffset);m(n!==-1);let a=this.fragments[n];m(a.moofOffset===e),this.isobmffReader.reader.forgetRange(e,e+r.totalSize);for(let[s,o]of a.trackData){if(o.startTimestampIsFinal)continue;let c=this.tracks.find(f=>f.id===s);this.isobmffReader.pos=0;let u=null,d=null,l=_(c.fragments,e-1,f=>f.moofOffset);for(l!==-1&&(u=c.fragments[l],d=u,this.isobmffReader.pos=u.moofOffset+u.moofSize);this.isobmffReader.posh.moofOffset);if(b===-1){this.isobmffReader.pos=f;let h=await this.readFragment();u&&(u.nextFragment=h),u=h}else{let h=this.fragments[b];u&&(u.nextFragment=h),u=h}}this.isobmffReader.pos=f+g.totalSize}u&&u.trackData.has(s)&&(d=u)}if(d){let f=d.trackData.get(s);m(f.startTimestampIsFinal),br(o,f.endTimestamp)}o.startTimestampIsFinal=!0}return a}readContiguousBoxes(e){let r=this.isobmffReader.pos;for(;this.isobmffReader.pos-rl.every((f,g)=>f===u[g]));d===-1?a.rotation=0:a.rotation=90*d}break;case"mdhd":{let a=this.currentTrack;m(a);let s=this.isobmffReader.readU8();this.isobmffReader.pos+=3,s===0?(this.isobmffReader.pos+=8,a.timescale=this.isobmffReader.readU32(),a.durationInTimescale=this.isobmffReader.readU32()):s===1&&(this.isobmffReader.pos+=16,a.timescale=this.isobmffReader.readU32(),a.durationInTimescale=this.isobmffReader.readU64())}break;case"hdlr":{let a=this.currentTrack;m(a),this.isobmffReader.pos+=8;let s=this.isobmffReader.readAscii(4);s==="vide"?a.info={type:"video",width:-1,height:-1,codec:null,codecDescription:null,colorSpace:null}:s==="soun"&&(a.info={type:"audio",numberOfChannels:-1,sampleRate:-1,codec:null,codecDescription:null})}break;case"stbl":{let a=this.currentTrack;m(a),a.sampleTableOffset=e,this.readContiguousBoxes(r.contentSize)}break;case"stsd":{let a=this.currentTrack;if(m(a),a.info===null||a.sampleTable)break;let s=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=this.isobmffReader.readU32();for(let c=0;c0){if(d===1)this.isobmffReader.pos+=4*4;else if(d===2){this.isobmffReader.pos+=4,f=this.isobmffReader.readF64(),l=this.isobmffReader.readU32(),this.isobmffReader.pos+=4;let g=this.isobmffReader.readU32(),b=this.isobmffReader.readU32(),h=this.isobmffReader.readU32(),k=this.isobmffReader.readU32()}}a.info.numberOfChannels=l,a.info.sampleRate=f,this.readContiguousBoxes(e+u.totalSize-this.isobmffReader.pos)}}}break;case"avcC":{let a=this.currentTrack;m(a&&a.info),a.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"hvcC":{let a=this.currentTrack;m(a&&a.info),a.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+r.contentSize)}break;case"colr":{let a=this.currentTrack;if(m(a&&a.info?.type==="video"),this.isobmffReader.readAscii(4)!=="nclx")break;let o=this.isobmffReader.readU16(),c=this.isobmffReader.readU16(),u=this.isobmffReader.readU16(),d=!!(this.isobmffReader.readU8()&128);a.info.colorSpace={primaries:Dt[o],transfer:Pt[c],matrix:zt[u],fullRange:d}}break;case"wave":r.totalSize>8&&this.readContiguousBoxes(r.contentSize);break;case"esds":{let a=this.currentTrack;m(a&&a.info),this.isobmffReader.pos+=4;let s=this.isobmffReader.readU8();m(s===3),this.isobmffReader.readIsomVariableInteger(),this.isobmffReader.pos+=2;let o=this.isobmffReader.readU8(),c=(o&128)!==0,u=(o&64)!==0,d=(o&32)!==0;if(c&&(this.isobmffReader.pos+=2),u){let h=this.isobmffReader.readU8();this.isobmffReader.pos+=h}d&&(this.isobmffReader.pos+=2);let l=this.isobmffReader.readU8();m(l===4),this.isobmffReader.readIsomVariableInteger();let f=this.isobmffReader.readU8();m(f===64),this.isobmffReader.pos+=12;let g=this.isobmffReader.readU8();m(g===5);let b=this.isobmffReader.readIsomVariableInteger();a.info.codecDescription=this.isobmffReader.readRange(this.isobmffReader.pos,this.isobmffReader.pos+b)}break;case"stts":{let a=this.currentTrack;if(m(a),!a.sampleTable)break;this.isobmffReader.pos+=4;let s=this.isobmffReader.readU32(),o=0,c=0;for(let u=0;uv.id===s);if(!o)break;o.fragmentLookupTable=[];let c=this.isobmffReader.readU32(),u=(c&48)>>4,d=(c&12)>>2,l=c&3,f=this.isobmffReader,g=[f.readU8.bind(f),f.readU16.bind(f),f.readU24.bind(f),f.readU32.bind(f)],b=g[u],h=g[d],k=g[l],y=this.isobmffReader.readU32();for(let v=0;vs.moofOffset);this.fragments.splice(a+1,0,this.currentFragment);for(let[,s]of this.currentFragment.trackData){let o=s.samples[0],c=R(s.samples);this.currentFragment.dataStart=Math.min(this.currentFragment.dataStart,o.byteOffset),this.currentFragment.dataEnd=Math.max(this.currentFragment.dataEnd,c.byteOffset+c.byteSize)}this.currentFragment=null}break;case"traf":if(m(this.currentFragment),this.readContiguousBoxes(r.contentSize),this.currentTrack){let a=this.currentFragment.trackData.get(this.currentTrack.id);if(a){let s=_(this.currentTrack.fragments,this.currentFragment.moofOffset,c=>c.moofOffset);this.currentTrack.fragments.splice(s+1,0,this.currentFragment);let{currentFragmentState:o}=this.currentTrack;m(o),o.startTimestamp!==null&&(br(a,o.startTimestamp),a.startTimestampIsFinal=!0)}this.currentTrack.currentFragmentState=null,this.currentTrack=null}break;case"tfhd":{m(this.currentFragment),this.isobmffReader.pos+=1;let a=this.isobmffReader.readU24(),s=!!(a&1),o=!!(a&2),c=!!(a&8),u=!!(a&16),d=!!(a&32),l=!!(a&65536),f=!!(a&131072),g=this.isobmffReader.readU32(),b=this.tracks.find(k=>k.id===g);if(!b)break;let h=this.fragmentTrackDefaults.find(k=>k.trackId===g);this.currentTrack=b,b.currentFragmentState={baseDataOffset:this.currentFragment.implicitBaseDataOffset,sampleDescriptionIndex:h?.defaultSampleDescriptionIndex??null,defaultSampleDuration:h?.defaultSampleDuration??null,defaultSampleSize:h?.defaultSampleSize??null,defaultSampleFlags:h?.defaultSampleFlags??null,startTimestamp:null},s?b.currentFragmentState.baseDataOffset=this.isobmffReader.readU64():f&&(b.currentFragmentState.baseDataOffset=this.currentFragment.moofOffset),o&&(b.currentFragmentState.sampleDescriptionIndex=this.isobmffReader.readU32()),c&&(b.currentFragmentState.defaultSampleDuration=this.isobmffReader.readU32()),u&&(b.currentFragmentState.defaultSampleSize=this.isobmffReader.readU32()),d&&(b.currentFragmentState.defaultSampleFlags=this.isobmffReader.readU32()),l&&(b.currentFragmentState.defaultSampleDuration=0)}break;case"tfdt":{let a=this.currentTrack;if(!a)break;m(a.currentFragmentState);let s=this.isobmffReader.readU8();this.isobmffReader.pos+=3;let o=s===0?this.isobmffReader.readU32():this.isobmffReader.readU64();a.currentFragmentState.startTimestamp=o}break;case"trun":{let a=this.currentTrack;if(!a)break;if(m(this.currentFragment),m(a.currentFragmentState),this.currentFragment.trackData.has(a.id))throw new Error("Can't have two trun boxes for the same track in one fragment.");let s=this.isobmffReader.readU8(),o=this.isobmffReader.readU24(),c=!!(o&1),u=!!(o&4),d=!!(o&256),l=!!(o&512),f=!!(o&1024),g=!!(o&2048),b=this.isobmffReader.readU32(),h=a.currentFragmentState.baseDataOffset;c&&(h+=this.isobmffReader.readI32());let k=null;u&&(k=this.isobmffReader.readU32());let y=h;if(b===0){this.currentFragment.implicitBaseDataOffset=y;break}let v=0,T={startTimestamp:0,endTimestamp:0,samples:[],presentationTimestamps:[],startTimestampIsFinal:!1};this.currentFragment.trackData.set(a.id,T);for(let U=0;U({presentationTimestamp:U.presentationTimestamp,sampleIndex:M})).sort((U,M)=>U.presentationTimestamp-M.presentationTimestamp);let A=T.samples[T.presentationTimestamps[0].sampleIndex],F=T.samples[R(T.presentationTimestamps).sampleIndex];T.startTimestamp=A.presentationTimestamp,T.endTimestamp=F.presentationTimestamp+F.duration,this.currentFragment.implicitBaseDataOffset=y}break}this.isobmffReader.pos=n}},$e=class{constructor(t){this.internalTrack=t;this.chunkToSampleIndex=new WeakMap;this.chunkToFragmentLocation=new WeakMap}getCodec(){throw new Error("Not implemented on base class.")}async computeDuration(){let e=(await this.getChunk(1/0,{metadataOnly:!0}))?.timestamp;return e?e/1e6:0}async getFirstChunk(t){return this.internalTrack.demuxer.isFragmented?this.performFragmentedLookup(()=>{let e=this.internalTrack.fragments[0];return{fragmentIndex:e?0:-1,sampleIndex:e?0:-1,correctSampleFound:!!e}},0,1/0,t):this.fetchChunkForSampleIndex(0,t)}roundToMicrosecond(t){return(Math.floor(t*1e6)+.99999999)/1e6}async getChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findSampleInFragmentsForTimestamp(r),r,r,e);{let n=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=pr(n,r);return this.fetchChunkForSampleIndex(a,e)}}async getNextChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let n=this.chunkToFragmentLocation.get(t);if(n===void 0)throw new Error("Chunk was not created from this track.");let a=n.fragment.trackData.get(this.internalTrack.id),s=a.samples[n.sampleIndex],o=Q(this.internalTrack.fragments,n.fragment.moofOffset,c=>c.moofOffset);return m(o!==-1),this.performFragmentedLookup(()=>{if(n.sampleIndex+1l.moofOffset);return m(d!==-1),{fragmentIndex:d,sampleIndex:0,correctSampleFound:!0}}return{fragmentIndex:o,sampleIndex:-1,correctSampleFound:!1}}},s.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");return this.fetchChunkForSampleIndex(r+1,e)}async getKeyChunk(t,e){t=this.roundToMicrosecond(t);let r=t*this.internalTrack.timescale;if(this.internalTrack.demuxer.isFragmented)return this.performFragmentedLookup(()=>this.findKeySampleInFragmentsForTimestamp(r),r,r,e);let n=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=pr(n,r),s=a===-1?-1:_i(n,a);return this.fetchChunkForSampleIndex(s,e)}async getNextKeyChunk(t,e){if(this.internalTrack.demuxer.isFragmented){let s=this.chunkToFragmentLocation.get(t);if(s===void 0)throw new Error("Chunk was not created from this track.");let o=s.fragment.trackData.get(this.internalTrack.id),c=o.samples[s.sampleIndex],u=Q(this.internalTrack.fragments,s.fragment.moofOffset,d=>d.moofOffset);return m(u!==-1),this.performFragmentedLookup(()=>{let d=o.samples.findIndex((l,f)=>l.isKeyFrame&&f>s.sampleIndex);if(d!==-1)return{fragmentIndex:u,sampleIndex:d,correctSampleFound:!0};{let l=s.fragment;for(;l.nextFragment;){l=l.nextFragment;let f=l.trackData.get(this.internalTrack.id);if(f){let g=Q(this.internalTrack.fragments,l.moofOffset,h=>h.moofOffset);m(g!==-1);let b=f.samples.findIndex(h=>h.isKeyFrame);if(b===-1)throw new Error("Not supported: Fragment does not contain key sample.");return{fragmentIndex:g,sampleIndex:b,correctSampleFound:!0}}}return{fragmentIndex:u,sampleIndex:-1,correctSampleFound:!1}}},c.presentationTimestamp,1/0,e)}let r=this.chunkToSampleIndex.get(t);if(r===void 0)throw new Error("Chunk was not created from this track.");let n=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),a=Ai(n,r);return this.fetchChunkForSampleIndex(a,e)}async fetchChunkForSampleIndex(t,e){if(t===-1)return null;let r=this.internalTrack.demuxer.getSampleTableForTrack(this.internalTrack),n=Ii(r,t);if(!n)return null;let a;e.metadataOnly?a=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(n.chunkOffset,n.chunkOffset+n.chunkSize),a=this.internalTrack.demuxer.chunkReader.readRange(n.sampleOffset,n.sampleOffset+n.sampleSize));let s=1e6*n.presentationTimestamp/this.internalTrack.timescale,o=1e6*n.duration/this.internalTrack.timescale,c=this.createChunk(a,s,o,n.isKeyFrame);return this.chunkToSampleIndex.set(c,t),c}async fetchChunkInFragment(t,e,r){if(e===-1)return null;let a=t.trackData.get(this.internalTrack.id).samples[e];m(a);let s;r.metadataOnly?s=new Uint8Array(0):(await this.internalTrack.demuxer.chunkReader.reader.loadRange(t.dataStart,t.dataEnd),s=this.internalTrack.demuxer.chunkReader.readRange(a.byteOffset,a.byteOffset+a.byteSize));let o=1e6*a.presentationTimestamp/this.internalTrack.timescale,c=1e6*a.duration/this.internalTrack.timescale,u=this.createChunk(s,o,c,a.isKeyFrame);return this.chunkToFragmentLocation.set(u,{fragment:t,sampleIndex:e}),u}findSampleInFragmentsForTimestamp(t){let e=_(this.internalTrack.fragments,t,a=>a.trackData.get(this.internalTrack.id).startTimestamp),r=-1,n=!1;if(e!==-1){let s=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=_(s.presentationTimestamps,t,c=>c.presentationTimestamp);m(o!==-1),r=s.presentationTimestamps[o].sampleIndex,n=ta.trackData.get(this.internalTrack.id).startTimestamp),r=-1,n=!1;if(e!==-1){let s=this.internalTrack.fragments[e].trackData.get(this.internalTrack.id),o=Wt(s.presentationTimestamps,u=>s.samples[u.sampleIndex].isKeyFrame&&u.presentationTimestamp<=t);if(o===-1)throw new Error("Not supported: Fragment does not begin with a key sample.");r=s.presentationTimestamps[o].sampleIndex,n=ty.timestamp);k!==-1&&(h=this.internalTrack.fragmentLookupTable[k])}if(o===-1)d.pos=h?.moofOffset??0;else{let k=this.internalTrack.fragments[o];!h||k.moofOffset>=k.moofOffset?(d.pos=k.moofOffset+k.moofSize,f=k):d.pos=h.moofOffset}for(;d.posr)break;if(f.nextFragment){d.pos=f.nextFragment.moofOffset+f.nextFragment.moofSize,f=f.nextFragment;continue}}await d.reader.loadRange(d.pos,d.pos+16);let k=d.pos,y=d.readBoxHeader();if(y.name==="moof"){let v=Q(a.fragments,k,T=>T.moofOffset);if(v===-1){d.pos=k;let T=await a.readFragment();f&&(f.nextFragment=T),f=T;let{fragmentIndex:A,sampleIndex:F,correctSampleFound:U}=t();if(U){let M=this.internalTrack.fragments[A];return this.fetchChunkInFragment(M,F,n)}A!==-1&&(g=A,b=F)}else{let T=a.fragments[v];f&&(f.nextFragment=T),f=T}}d.pos=k+y.totalSize}if(g!==-1){let k=this.internalTrack.fragments[g];return this.fetchChunkInFragment(k,b,n)}return null}finally{s()}}},At=class extends $e{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getCodedWidth(){return this.internalTrack.info.width}async getCodedHeight(){return this.internalTrack.info.height}async getRotation(){return this.internalTrack.rotation}async getDecoderConfig(){return{codec:sr(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),codedWidth:this.internalTrack.info.width,codedHeight:this.internalTrack.info.height,description:this.internalTrack.info.codecDescription??void 0,colorSpace:this.internalTrack.info.colorSpace??void 0}}createChunk(t,e,r,n){return new EncodedVideoChunk({data:t,timestamp:e,duration:r,type:n?"key":"delta"})}},Rt=class extends $e{constructor(t){super(t),this.internalTrack=t}async getCodec(){return this.internalTrack.info.codec}async getNumberOfChannels(){return this.internalTrack.info.numberOfChannels}async getSampleRate(){return this.internalTrack.info.sampleRate}async getDecoderConfig(){return{codec:cr(this.internalTrack.info.codec,this.internalTrack.info.codecDescription),numberOfChannels:this.internalTrack.info.numberOfChannels,sampleRate:this.internalTrack.info.sampleRate,description:this.internalTrack.info.codecDescription??void 0}}createChunk(t,e,r,n){return new EncodedAudioChunk({data:t,timestamp:e,duration:r,type:n?"key":"delta"})}},pr=(i,t)=>{let e=_(i.presentationTimestamps,t,r=>r.presentationTimestamp);return e===-1?-1:i.presentationTimestamps[e].sampleIndex},Ii=(i,t)=>{let e=_(i.sampleTimingEntries,t,h=>h.startIndex),r=i.sampleTimingEntries[e];if(!r||r.startIndex+r.count<=t)return null;let a=r.startDecodeTimestamp+(t-r.startIndex)*r.delta,s=_(i.sampleCompositionTimeOffsets,t,h=>h.startIndex),o=i.sampleCompositionTimeOffsets[s];o&&(a+=o.offset);let c=i.sampleSizes[Math.min(t,i.sampleSizes.length-1)],u=_(i.sampleToChunk,t,h=>h.startSampleIndex),d=i.sampleToChunk[u];m(d);let l=d.startChunkIndex+Math.floor((t-d.startSampleIndex)/d.samplesPerChunk),f=i.chunkOffsets[l],g=0,b=f;if(i.sampleSizes.length===1)b+=c*(t-d.startSampleIndex),g+=c*d.samplesPerChunk;else{let h=d.startSampleIndex+(l-d.startChunkIndex)*d.samplesPerChunk;for(let k=h;kh)!==-1:!0}},_i=(i,t)=>{if(!i.keySampleIndices)return t;let e=_(i.keySampleIndices,t,r=>r);return i.keySampleIndices[e]??-1},Ai=(i,t)=>{if(!i.keySampleIndices)return t+1;let e=_(i.keySampleIndices,t,r=>r);return i.keySampleIndices[e+1]??-1},br=(i,t)=>{i.startTimestamp+=t,i.endTimestamp+=t;for(let e of i.samples)e.presentationTimestamp+=t;for(let e of i.presentationTimestamps)e.presentationTimestamp+=t};var ne=class{},qe=class extends ne{async _canReadInput(t){if(await t._mainReader.source._getSize()<8)return!1;let r=new ae(t._mainReader);return r.pos=4,r.readAscii(4)==="ftyp"}_createDemuxer(t){return new je(t)}},Xe=class extends ne{async _canReadInput(){return!1}_createDemuxer(){throw new Error("Not implemented")}},Ge=new qe,Ri=Ge,Oi=Ge,Ot=new Xe,kr=Ot,Ei=Ot,Fi=[Ge,kr];var Et=class{constructor(t){this._demuxerPromise=null;this._format=null;if(!t||typeof t!="object")throw new TypeError("options must be an object.");if(!Array.isArray(t.formats)||t.formats.some(e=>!(e instanceof ne)))throw new TypeError("options.formats must be an array of InputFormat.");if(!(t.source instanceof ie))throw new TypeError("options.source must be a Source.");this._formats=t.formats,this._source=t.source,this._mainReader=new pe(t.source)}_getDemuxer(){return this._demuxerPromise??=(async()=>{await this._mainReader.loadRange(0,4096);for(let t of this._formats)if(await t._canReadInput(this))return this._format=t,t._createDemuxer(this);throw new Error("Input has an unrecognizable format.")})()}async getFormat(){return await this._getDemuxer(),m(this._format),this._format}async computeDuration(){return(await this._getDemuxer()).computeDuration()}async getTracks(){return(await this._getDemuxer()).getTracks()}async getVideoTracks(){return(await this.getTracks()).filter(e=>e.isVideoTrack())}async getPrimaryVideoTrack(){return(await this.getTracks()).find(e=>e.isVideoTrack())??null}async getAudioTracks(){return(await this.getTracks()).filter(e=>e.isAudioTrack())}async getPrimaryAudioTrack(){return(await this.getTracks()).find(e=>e.isAudioTrack())??null}async getMimeType(){return(await this._getDemuxer()).getMimeType()}};var L=i=>{if(!i||typeof i!="object")throw new TypeError("options must be an object.");if(i.metadataOnly!==void 0&&typeof i.metadataOnly!="boolean")throw new TypeError("options.metadataOnly, when defined, must be a boolean.")},z=i=>{if(typeof i!="number"||Number.isNaN(i))throw new TypeError("timestamp must be a number.")},Ie=class{async*chunks(t,e=1/0){let r=[],{promise:n,resolve:a}=E(),{promise:s,resolve:o}=E(),c=!1,u=[],d=()=>Math.max(2,u.length);(async()=>{let l=t??await this.getFirstChunk();for(;l&&!c&&!(l.timestamp/1e6>=e);){if(r.length>d()){({promise:s,resolve:o}=E()),await s;continue}r.push(l),a(),{promise:n,resolve:a}=E(),l=await this.getNextChunk(l)}c=!0,a()})();try{for(;;)if(r.length>0){yield r.shift();let l=performance.now();for(u.push(l);u.length>0&&l-u[0]>=1e3;)u.shift();o()}else if(!c)await n;else break}finally{c=!0,o()}}},_e=class{_duplicateFrame(t){return structuredClone(t)}async*mediaFramesAtTimestamps(t){Lt(t);let e=Ht(t),r=[],n=[],{promise:a,resolve:s}=E(),{promise:o,resolve:c}=E(),u=!1,d=!1,l=8,f=null,g=h=>{n.push(h),s(),{promise:a,resolve:s}=E()},b=await this._createDecoder(h=>{if(c(),d){h.close();return}let k=!1;for(;r.length>0&&r[0]===h.timestamp;)g(this._duplicateFrame(h)),r.shift(),k=!0;k?(f?.close(),f=h):h.close()});(async()=>{let h=this._createChunkDrain(),k=null,y=null;for await(let v of e){for(z(v);n.length+b.decodeQueueSize>l;)({promise:o,resolve:c}=E()),await o;if(d)break;let T=await h.getChunk(v);if(!T){g(null);continue}let A=await h.getKeyChunk(v);if(!A){g(null);continue}for(r.push(T.timestamp),k&&A.timestamp===k.timestamp&&T.timestamp>=y.timestamp?(m(y),T.timestamp===y.timestamp&&r.length===1&&(f&&g(this._duplicateFrame(f)),r.shift())):(k=A,y=A,b.decode(A));y.timestamp!==T.timestamp;){let F=await h.getNextChunk(y);m(F),y=F,b.decode(F)}b.decodeQueueSize>=10&&await new Promise(F=>b.addEventListener("dequeue",F,{once:!0}))}await b.flush(),b.close(),u=!0,s()})();try{for(;;)if(n.length>0){let h=n.shift();m(h!==void 0),yield h,c()}else if(!u)await a;else break}finally{d=!0,c();for(let h of n)h?.close();f?.close()}}async*mediaFramesInRange(t=0,e=1/0){z(t),z(e);let r=[],n=!1,a=null,{promise:s,resolve:o}=E(),{promise:c,resolve:u}=E(),d=!1,l=!1,f=8,g=await this._createDecoder(k=>{u();let y=k.timestamp/1e6;if(y>=e&&(l=!0),l){k.close();return}a&&(y>t?(r.push(a),n=!0):a.close()),y>=t&&(r.push(k),n=!0),a=n?null:k,r.length>0&&(o(),{promise:s,resolve:o}=E())}),b=this._createChunkDrain(),h=await b.getKeyChunk(t)??await b.getFirstChunk();if(h){(async()=>{let k=h,y=1/0;if(e<1/0){let T=await b.getChunk(e),A=T?T.type==="key"&&T.timestamp/1e6===e?T:await b.getNextKeyChunk(T):null;A&&(y=A.timestamp/1e6)}let v=b.chunks(h,y);for(await v.next();k&&!l;){if(r.length+g.decodeQueueSize>f){({promise:c,resolve:u}=E()),await c;continue}g.decode(k);let T=await v.next();if(T.done)break;k=T.value}await v.return(),await g.flush(),g.close(),!n&&a&&r.push(a),d=!0,o()})();try{for(;;)if(r.length>0)yield r.shift(),u();else if(!d)await s;else break}finally{l=!0,u();for(let k of r)k.close()}}}},Ye=class extends Ie{constructor(t){if(!(t instanceof W))throw new TypeError("videoTrack must be an InputVideoTrack.");super(),this._videoTrack=t}getFirstChunk(t={}){return L(t),this._videoTrack._backing.getFirstChunk(t)}getChunk(t,e={}){return z(t),L(e),this._videoTrack._backing.getChunk(t,e)}getNextChunk(t,e={}){if(!(t instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return L(e),this._videoTrack._backing.getNextChunk(t,e)}getKeyChunk(t,e={}){return z(t),L(e),this._videoTrack._backing.getKeyChunk(t,e)}getNextKeyChunk(t,e={}){if(!(t instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");return L(e),this._videoTrack._backing.getNextKeyChunk(t,e)}},Ze=class extends _e{constructor(e){if(!(e instanceof W))throw new TypeError("videoTrack must be an InputVideoTrack.");super();this._decoderConfig=null;this._videoTrack=e}async _createDecoder(e){this._decoderConfig??=await this._videoTrack.getDecoderConfig();let r=new VideoDecoder({output:e,error:n=>console.error(n)});return r.configure(this._decoderConfig),r}_createChunkDrain(){return new Ye(this._videoTrack)}async getFrame(e){z(e);for await(let r of this.mediaFramesAtTimestamps([e]))return r;throw new Error("Internal error: Iterator returned nothing.")}frames(e=0,r=1/0){return this.mediaFramesInRange(e,r)}framesAtTimestamps(e){return this.mediaFramesAtTimestamps(e)}},Ft=class{constructor(t,e){if(!(t instanceof W))throw new TypeError("videoTrack must be an InputVideoTrack.");if(e&&typeof e!="object")throw new TypeError("dimensions, when defined, must be an object.");if(e&&(!Number.isInteger(e.width)||e.width<=0))throw new TypeError("dimensions.width must be a positive integer.");if(e&&(!Number.isInteger(e.height)||e.height<=0))throw new TypeError("dimensions.height must be a positive integer.");this._videoTrack=t,this._dimensions=e,this._videoFrameDrain=new Ze(t)}async _videoFrameToWrappedCanvas(t){let e=this._dimensions?.width??await this._videoTrack.getDisplayWidth(),r=this._dimensions?.height??await this._videoTrack.getDisplayHeight(),n=await this._videoTrack.getRotation(),a=document.createElement("canvas");a.width=e,a.height=r;let s=a.getContext("2d",{alpha:!1});m(s),s.translate(e/2,r/2),s.rotate(n*Math.PI/180),s.translate(-e/2,-r/2);let[o,c]=n%180===0?[e,r]:[r,e];s.drawImage(t,(e-o)/2,(r-c)/2,o,c);let u={canvas:a,timestamp:t.timestamp/1e6,duration:(t.duration??0)/1e6};return t.close(),u}async getCanvas(t){z(t);let e=await this._videoFrameDrain.getFrame(t);return e&&this._videoFrameToWrappedCanvas(e)}async*canvases(t=0,e=1/0){for await(let r of this._videoFrameDrain.frames(t,e))yield this._videoFrameToWrappedCanvas(r)}async*canvasesAtTimestamps(t){for await(let e of this._videoFrameDrain.framesAtTimestamps(t))yield e&&this._videoFrameToWrappedCanvas(e)}},Je=class extends Ie{constructor(t){if(!(t instanceof H))throw new TypeError("audioTrack must be an InputAudioTrack.");super(),this._audioTrack=t}getFirstChunk(t={}){return L(t),this._audioTrack._backing.getFirstChunk(t)}getChunk(t,e={}){return z(t),L(e),this._audioTrack._backing.getChunk(t,e)}getNextChunk(t,e={}){if(!(t instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return L(e),this._audioTrack._backing.getNextChunk(t,e)}getKeyChunk(t,e={}){return z(t),L(e),this._audioTrack._backing.getKeyChunk(t,e)}getNextKeyChunk(t,e={}){if(!(t instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");return L(e),this._audioTrack._backing.getNextKeyChunk(t,e)}},et=class extends _e{constructor(e){if(!(e instanceof H))throw new TypeError("audioTrack must be an InputAudioTrack.");super();this._decoderConfig=null;this._audioTrack=e}async _createDecoder(e){this._decoderConfig??=await this._audioTrack.getDecoderConfig();let r=new AudioDecoder({output:e,error:n=>console.error(n)});return r.configure(this._decoderConfig),r}_createChunkDrain(){return new Je(this._audioTrack)}async getData(e){z(e);for await(let r of this.mediaFramesAtTimestamps([e]))return r;throw new Error("Internal error: Iterator returned nothing.")}data(e=0,r=1/0){return this.mediaFramesInRange(e,r)}dataAtTimestamps(e){return this.mediaFramesAtTimestamps(e)}},Vt=class{constructor(t){if(!(t instanceof H))throw new TypeError("audioTrack must be an InputAudioTrack.");this._audioDataDrain=new et(t)}_audioDataToWrappedArrayBuffer(t){let e=new AudioBuffer({numberOfChannels:t.numberOfChannels,length:t.numberOfFrames,sampleRate:t.sampleRate}),r=new Float32Array(t.allocationSize({planeIndex:0,format:"f32-planar"})/4);for(let s=0;s { + if (!(Symbol.iterator in iterable) && !(Symbol.asyncIterator in iterable)) { + throw new TypeError("Argument must be an iterable or async iterable."); + } +}; // src/subtitles.ts var cueBlockHeaderRegex = /(?:(.+?)\n)?((?:\d{2}:)?\d{2}:\d{2}.\d{3})\s+-->\s+((?:\d{2}:)?\d{2}:\d{2}.\d{3})/g; @@ -4005,22 +4010,28 @@ var Source = class { return this._sizePromise ??= this._retrieveSize(); } }; -var ArrayBufferSource = class extends Source { +var BufferSource = class extends Source { constructor(buffer) { + if (!(buffer instanceof ArrayBuffer) && !(buffer instanceof Uint8Array)) { + throw new TypeError("buffer must be an ArrayBuffer or Uint8Array."); + } super(); - this._buffer = buffer; + this._bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer); } /** @internal */ async _read(start, end) { - return new Uint8Array(this._buffer, start, end - start); + return this._bytes.subarray(start, end); } /** @internal */ async _retrieveSize() { - return this._buffer.byteLength; + return this._bytes.byteLength; } }; var BlobSource = class extends Source { constructor(blob) { + if (!(blob instanceof Blob)) { + throw new TypeError("blob must be a Blob."); + } super(); this._blob = blob; } @@ -5833,6 +5844,15 @@ var Input = class { this._demuxerPromise = null; /** @internal */ this._format = null; + if (!options || typeof options !== "object") { + throw new TypeError("options must be an object."); + } + if (!Array.isArray(options.formats) || options.formats.some((x) => !(x instanceof InputFormat))) { + throw new TypeError("options.formats must be an array of InputFormat."); + } + if (!(options.source instanceof Source)) { + throw new TypeError("options.source must be a Source."); + } this._formats = options.formats; this._source = options.source; this._mainReader = new Reader(options.source); @@ -5887,6 +5907,19 @@ var Input = class { }; // src/media-drain.ts +var validateChunkRetrievalOptions = (options) => { + if (!options || typeof options !== "object") { + throw new TypeError("options must be an object."); + } + if (options.metadataOnly !== void 0 && typeof options.metadataOnly !== "boolean") { + throw new TypeError("options.metadataOnly, when defined, must be a boolean."); + } +}; +var validateTimestamp = (timestamp) => { + if (typeof timestamp !== "number" || Number.isNaN(timestamp)) { + throw new TypeError("timestamp must be a number."); + } +}; var BaseChunkDrain = class { async *chunks(startChunk, endTimestamp = Infinity) { const chunkQueue = []; @@ -5942,6 +5975,7 @@ var BaseMediaFrameDrain = class { return structuredClone(frame); } async *mediaFramesAtTimestamps(timestamps) { + validateAnyIterable(timestamps); const timestampIterator = toAsyncIterator(timestamps); const timestampsOfInterest = []; const frameQueue = []; @@ -5980,6 +6014,7 @@ var BaseMediaFrameDrain = class { let lastKeyChunk = null; let lastChunk = null; for await (const timestamp of timestampIterator) { + validateTimestamp(timestamp); while (frameQueue.length + decoder.decodeQueueSize > MAX_QUEUE_SIZE) { ({ promise: queueDequeue, resolve: onQueueDequeue } = promiseWithResolvers()); await queueDequeue; @@ -6049,6 +6084,8 @@ var BaseMediaFrameDrain = class { } } async *mediaFramesInRange(startTimestamp = 0, endTimestamp = Infinity) { + validateTimestamp(startTimestamp); + validateTimestamp(endTimestamp); const frameQueue = []; let firstFrameQueued = false; let lastFrame = null; @@ -6146,27 +6183,46 @@ var BaseMediaFrameDrain = class { }; var EncodedVideoChunkDrain = class extends BaseChunkDrain { constructor(videoTrack) { + if (!(videoTrack instanceof InputVideoTrack)) { + throw new TypeError("videoTrack must be an InputVideoTrack."); + } super(); this._videoTrack = videoTrack; } getFirstChunk(options = {}) { + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getFirstChunk(options); } getChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getChunk(timestamp, options); } getNextChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedVideoChunk)) { + throw new TypeError("chunk must be an EncodedVideoChunk."); + } + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getNextChunk(chunk, options); } getKeyChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getKeyChunk(timestamp, options); } getNextKeyChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedVideoChunk)) { + throw new TypeError("chunk must be an EncodedVideoChunk."); + } + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getNextKeyChunk(chunk, options); } }; var VideoFrameDrain = class extends BaseMediaFrameDrain { constructor(videoTrack) { + if (!(videoTrack instanceof InputVideoTrack)) { + throw new TypeError("videoTrack must be an InputVideoTrack."); + } super(); /** @internal */ this._decoderConfig = null; @@ -6187,6 +6243,7 @@ var VideoFrameDrain = class extends BaseMediaFrameDrain { return new EncodedVideoChunkDrain(this._videoTrack); } async getFrame(timestamp) { + validateTimestamp(timestamp); for await (const frame of this.mediaFramesAtTimestamps([timestamp])) { return frame; } @@ -6201,6 +6258,18 @@ var VideoFrameDrain = class extends BaseMediaFrameDrain { }; var CanvasDrain = class { constructor(videoTrack, dimensions) { + if (!(videoTrack instanceof InputVideoTrack)) { + throw new TypeError("videoTrack must be an InputVideoTrack."); + } + if (dimensions && typeof dimensions !== "object") { + throw new TypeError("dimensions, when defined, must be an object."); + } + if (dimensions && (!Number.isInteger(dimensions.width) || dimensions.width <= 0)) { + throw new TypeError("dimensions.width must be a positive integer."); + } + if (dimensions && (!Number.isInteger(dimensions.height) || dimensions.height <= 0)) { + throw new TypeError("dimensions.height must be a positive integer."); + } this._videoTrack = videoTrack; this._dimensions = dimensions; this._videoFrameDrain = new VideoFrameDrain(videoTrack); @@ -6229,6 +6298,7 @@ var CanvasDrain = class { return result; } async getCanvas(timestamp) { + validateTimestamp(timestamp); const frame = await this._videoFrameDrain.getFrame(timestamp); return frame && this._videoFrameToWrappedCanvas(frame); } @@ -6245,27 +6315,46 @@ var CanvasDrain = class { }; var EncodedAudioChunkDrain = class extends BaseChunkDrain { constructor(audioTrack) { + if (!(audioTrack instanceof InputAudioTrack)) { + throw new TypeError("audioTrack must be an InputAudioTrack."); + } super(); this._audioTrack = audioTrack; } getFirstChunk(options = {}) { + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getFirstChunk(options); } getChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getChunk(timestamp, options); } getNextChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedAudioChunk)) { + throw new TypeError("chunk must be an EncodedAudioChunk."); + } + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getNextChunk(chunk, options); } getKeyChunk(timestamp, options = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getKeyChunk(timestamp, options); } getNextKeyChunk(chunk, options = {}) { + if (!(chunk instanceof EncodedAudioChunk)) { + throw new TypeError("chunk must be an EncodedAudioChunk."); + } + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getNextKeyChunk(chunk, options); } }; var AudioDataDrain = class extends BaseMediaFrameDrain { constructor(audioTrack) { + if (!(audioTrack instanceof InputAudioTrack)) { + throw new TypeError("audioTrack must be an InputAudioTrack."); + } super(); /** @internal */ this._decoderConfig = null; @@ -6286,6 +6375,7 @@ var AudioDataDrain = class extends BaseMediaFrameDrain { return new EncodedAudioChunkDrain(this._audioTrack); } async getData(timestamp) { + validateTimestamp(timestamp); for await (const data of this.mediaFramesAtTimestamps([timestamp])) { return data; } @@ -6300,6 +6390,9 @@ var AudioDataDrain = class extends BaseMediaFrameDrain { }; var AudioBufferDrain = class { constructor(audioTrack) { + if (!(audioTrack instanceof InputAudioTrack)) { + throw new TypeError("audioTrack must be an InputAudioTrack."); + } this._audioDataDrain = new AudioDataDrain(audioTrack); } /** @internal */ @@ -6324,6 +6417,7 @@ var AudioBufferDrain = class { return result; } async getBuffer(timestamp) { + validateTimestamp(timestamp); const data = await this._audioDataDrain.getData(timestamp); return data && this._audioDataToWrappedArrayBuffer(data); } @@ -6341,7 +6435,6 @@ var AudioBufferDrain = class { export { ALL_FORMATS, AUDIO_CODECS, - ArrayBufferSource, ArrayBufferTarget, AudioBufferDrain, AudioBufferSource, @@ -6351,6 +6444,7 @@ export { BaseChunkDrain, BaseMediaFrameDrain, BlobSource, + BufferSource, CanvasDrain, CanvasSource, EncodedAudioChunkDrain, diff --git a/src/index.ts b/src/index.ts index e7758ec..6656240 100644 --- a/src/index.ts +++ b/src/index.ts @@ -36,7 +36,7 @@ export { } from './codec'; export { Target, ArrayBufferTarget, StreamTarget, StreamTargetChunk, StreamTargetOptions } from './target'; export { Rotation, TransformationMatrix, AnyIterable } from './misc'; -export { Source, ArrayBufferSource, BlobSource } from './source'; +export { Source, BufferSource, BlobSource } from './source'; export { InputFormat, IsobmffInputFormat, diff --git a/src/input-track.ts b/src/input-track.ts index f4621fd..52bfd83 100644 --- a/src/input-track.ts +++ b/src/input-track.ts @@ -58,7 +58,7 @@ export class InputVideoTrack extends InputTrack { this._backing = backing; } - getCodec() { + getCodec(): Promise { return this._backing.getCodec(); } @@ -118,7 +118,7 @@ export class InputAudioTrack extends InputTrack { this._backing = backing; } - getCodec() { + getCodec(): Promise { return this._backing.getCodec(); } diff --git a/src/input.ts b/src/input.ts index 26efeba..a2901d0 100644 --- a/src/input.ts +++ b/src/input.ts @@ -24,6 +24,16 @@ export class Input { _format: InputFormat | null = null; constructor(options: InputOptions) { + if (!options || typeof options !== 'object') { + throw new TypeError('options must be an object.'); + } + if (!Array.isArray(options.formats) || options.formats.some(x => !(x instanceof InputFormat))) { + throw new TypeError('options.formats must be an array of InputFormat.'); + } + if (!(options.source instanceof Source)) { + throw new TypeError('options.source must be a Source.'); + } + this._formats = options.formats; this._source = options.source; this._mainReader = new Reader(options.source); diff --git a/src/media-drain.ts b/src/media-drain.ts index 8ef5332..0f8682c 100644 --- a/src/media-drain.ts +++ b/src/media-drain.ts @@ -1,11 +1,26 @@ import { InputAudioTrack, InputVideoTrack } from './input-track'; -import { AnyIterable, assert, promiseWithResolvers, toAsyncIterator } from './misc'; +import { AnyIterable, assert, promiseWithResolvers, toAsyncIterator, validateAnyIterable } from './misc'; /** @public */ export type ChunkRetrievalOptions = { metadataOnly?: boolean; }; +const validateChunkRetrievalOptions = (options: ChunkRetrievalOptions) => { + if (!options || typeof options !== 'object') { + throw new TypeError('options must be an object.'); + } + if (options.metadataOnly !== undefined && typeof options.metadataOnly !== 'boolean') { + throw new TypeError('options.metadataOnly, when defined, must be a boolean.'); + } +}; + +const validateTimestamp = (timestamp: number) => { + if (typeof timestamp !== 'number' || Number.isNaN(timestamp)) { + throw new TypeError('timestamp must be a number.'); // It can be non-finite, that's fine + } +}; + /** @public */ export abstract class BaseChunkDrain { abstract getFirstChunk(options?: ChunkRetrievalOptions): Promise; @@ -93,6 +108,7 @@ export abstract class BaseMediaFrameDrain< } protected async* mediaFramesAtTimestamps(timestamps: AnyIterable) { + validateAnyIterable(timestamps); const timestampIterator = toAsyncIterator(timestamps); const timestampsOfInterest: number[] = []; @@ -141,6 +157,8 @@ export abstract class BaseMediaFrameDrain< let lastChunk: Chunk | null = null; for await (const timestamp of timestampIterator) { + validateTimestamp(timestamp); + while (frameQueue.length + decoder.decodeQueueSize > MAX_QUEUE_SIZE) { ({ promise: queueDequeue, resolve: onQueueDequeue } = promiseWithResolvers()); await queueDequeue; @@ -230,6 +248,9 @@ export abstract class BaseMediaFrameDrain< } protected async* mediaFramesInRange(startTimestamp = 0, endTimestamp = Infinity) { + validateTimestamp(startTimestamp); + validateTimestamp(endTimestamp); + const frameQueue: MediaFrame[] = []; let firstFrameQueued = false; let lastFrame: MediaFrame | null = null; @@ -368,28 +389,45 @@ export class EncodedVideoChunkDrain extends BaseChunkDrain { _videoTrack: InputVideoTrack; constructor(videoTrack: InputVideoTrack) { + if (!(videoTrack instanceof InputVideoTrack)) { + throw new TypeError('videoTrack must be an InputVideoTrack.'); + } + super(); this._videoTrack = videoTrack; } getFirstChunk(options: ChunkRetrievalOptions = {}) { + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getFirstChunk(options); } getChunk(timestamp: number, options: ChunkRetrievalOptions = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getChunk(timestamp, options); } getNextChunk(chunk: EncodedVideoChunk, options: ChunkRetrievalOptions = {}) { + if (!(chunk instanceof EncodedVideoChunk)) { + throw new TypeError('chunk must be an EncodedVideoChunk.'); + } + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getNextChunk(chunk, options); } getKeyChunk(timestamp: number, options: ChunkRetrievalOptions = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getKeyChunk(timestamp, options); } getNextKeyChunk(chunk: EncodedVideoChunk, options: ChunkRetrievalOptions = {}) { + if (!(chunk instanceof EncodedVideoChunk)) { + throw new TypeError('chunk must be an EncodedVideoChunk.'); + } + validateChunkRetrievalOptions(options); return this._videoTrack._backing.getNextKeyChunk(chunk, options); } } @@ -402,6 +440,10 @@ export class VideoFrameDrain extends BaseMediaFrameDrain { _audioTrack: InputAudioTrack; constructor(audioTrack: InputAudioTrack) { + if (!(audioTrack instanceof InputAudioTrack)) { + throw new TypeError('audioTrack must be an InputAudioTrack.'); + } + super(); this._audioTrack = audioTrack; } getFirstChunk(options: ChunkRetrievalOptions = {}) { + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getFirstChunk(options); } getChunk(timestamp: number, options: ChunkRetrievalOptions = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getChunk(timestamp, options); } getNextChunk(chunk: EncodedAudioChunk, options: ChunkRetrievalOptions = {}) { + if (!(chunk instanceof EncodedAudioChunk)) { + throw new TypeError('chunk must be an EncodedAudioChunk.'); + } + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getNextChunk(chunk, options); } getKeyChunk(timestamp: number, options: ChunkRetrievalOptions = {}) { + validateTimestamp(timestamp); + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getKeyChunk(timestamp, options); } getNextKeyChunk(chunk: EncodedAudioChunk, options: ChunkRetrievalOptions = {}) { + if (!(chunk instanceof EncodedAudioChunk)) { + throw new TypeError('chunk must be an EncodedAudioChunk.'); + } + validateChunkRetrievalOptions(options); return this._audioTrack._backing.getNextKeyChunk(chunk, options); } } @@ -552,6 +628,10 @@ export class AudioDataDrain extends BaseMediaFrameDrain(source: AnyIterable): Asyn yield* source[Symbol.asyncIterator](); } }; + +export const validateAnyIterable = (iterable: AnyIterable) => { + if (!(Symbol.iterator in iterable) && !(Symbol.asyncIterator in iterable)) { + throw new TypeError('Argument must be an iterable or async iterable.'); + } +}; diff --git a/src/source.ts b/src/source.ts index 6aa3bf6..072cf4e 100644 --- a/src/source.ts +++ b/src/source.ts @@ -15,24 +15,28 @@ export abstract class Source { } /** @public */ -export class ArrayBufferSource extends Source { +export class BufferSource extends Source { /** @internal */ - _buffer: ArrayBuffer; + _bytes: Uint8Array; + + constructor(buffer: ArrayBuffer | Uint8Array) { + if (!(buffer instanceof ArrayBuffer) && !(buffer instanceof Uint8Array)) { + throw new TypeError('buffer must be an ArrayBuffer or Uint8Array.'); + } - constructor(buffer: ArrayBuffer) { super(); - this._buffer = buffer; + this._bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer); } /** @internal */ override async _read(start: number, end: number) { - return new Uint8Array(this._buffer, start, end - start); + return this._bytes.subarray(start, end); } /** @internal */ override async _retrieveSize() { - return this._buffer.byteLength; + return this._bytes.byteLength; } } @@ -42,6 +46,10 @@ export class BlobSource extends Source { _blob: Blob; constructor(blob: Blob) { + if (!(blob instanceof Blob)) { + throw new TypeError('blob must be a Blob.'); + } + super(); this._blob = blob;